Central Heating Products
Central heating products cover a wide range of components and controls used in domestic heating systems. This category includes heating controls, motorised valves, thermostats, programmers and time switches, water treatment chemicals, flue terminal guards, and related accessories. Subcategories are organised to help identify suitable products for system control, maintenance, replacement, and upgrades across common UK household heating installations.
Products in this category support common UK heating system specifications, including 15mm and 22mm pipework, standard BSP threaded connections, and compatibility with domestic gas and combi boiler systems. Installation and operating instructions are available via our product instruction library.
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£11.28A compact, low‑cost 12‑way junction box for central‑heating control wiring. The Tower WIR12JB provides 12 double screw terminals (10 A rated) with 2×1.5 mm² terminal capacity, four cable entries and cable restraints — ideal for tidying thermostat, programmer and valve/pump control wiring inside cupboards or small control panels.
12 Way Wiring Centre WIR12JB
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£14.95A compact purpose‑built junction box for central‑heating control wiring, the Tower WIRERITE WIR16JB gives installers a tidy, labelled place to terminate programmers, thermostats, valves, pumps and boiler feeds. It’s supplied with pre‑linked neutral and earth terminals and a mix of in‑wall and surface knockouts with cable restraints, making it suitable for S‑plan and Y‑plan systems where neat, serviceable wiring is important.
16 Way Junction Box WIR16JB
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£15.49A compact automatic bypass valve for domestic central‑heating systems. The Tower ABBV1 (22mm) opens to a preset differential (0.1–0.6 bar) to maintain minimum boiler flow, reduce TRV/zone‑valve noise and protect pump and heat‑exchanger. It fits in a bypass loop after the pump and has lockable adjustment for consistent settings.
ABBV1 auto-bypass valve
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£15.59A compact 22mm straight automatic bypass valve for domestic central‑heating systems. It maintains a controlled minimum flow through the boiler by opening to bypass water when TRVs or zone valves increase system resistance, reducing noise and protecting the pump and heat exchanger.
The valve offers an adjustable differential range (0.1–0.6 bar), up to 50 L/min capacity and lockable settings, and is supplied with 22mm compression connections for straightforward inline installation.
ABBV1ST auto-bypass valve
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£20.05A compact in‑line automatic air separator for 22mm copper central‑heating pipework (Tower AIR22). It continuously collects and vents entrained air to the feed & expansion tank, reducing noise, airlocks and pump cavitation — intended for open‑vented systems and supplied for soldered connections only.
Air Separator 22mm & 28mm AIR22
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£34.99A compact automatic air separator for 22mm copper central‑heating pipework with an integrated 15mm cold‑feed inlet. It passively coalesces and removes entrained air to reduce radiator noise, air locks and pump wear; the unit is supplied for soldered installations and is intended for open‑vented (conventional) systems.
Air Separator 22mm With Cold Feed AIR22CF
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£15.95A pair of anthracite‑finished angled manual radiator valves (Tower / TFC Group, Product code MRVM‑A) intended for 15mm pipe and 1/2″ BSP radiator tails. They’re a straightforward, colour‑matched option for installations where the pipework meets the radiator at a right angle and where manual flow/isolation is acceptable.
Anthracite Angled Radiator Valves
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£15.95A pair of straight manual radiator valves in anthracite (Tower MRVMST-A). Designed for 15mm-to-1/2″ BSP radiator connections, they provide simple mechanical flow control and a contemporary finish to match anthracite radiators and towel rails.
Anthracite Straight Radiator Valves
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£69.95A compact, ERP‑compliant permanent‑magnet circulator for domestic central‑heating systems. The APUMPHE offers a 1.5″ G1 (BSP) flange with 130 mm port spacing, a maximum head of 6 m and up to 3.0 m³/h flow; an internal differential‑pressure controller lets it auto‑modulate between low and high power to cut running costs and noise.
APUMPHE High-Efficiency Pump
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A compact combined air vent and stainless‑steel debris filter for 22mm domestic heating pipework. The Tower AIREL passively removes entrained air and non‑magnetic particles while maintaining high flow; it’s a practical complement to a magnetic filter for fuller protection of boilers, pumps and radiators.
Automatic Air Separator 22mm
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£22.99A small welded wire mesh cage finished in brown plastic coating, the Tower TGDOF1644 is designed to sit around an external boiler pressure‑relief or overflow terminal to prevent accidental contact with hot discharge. It offers weather resistance and a visible, unobtrusive barrier while leaving the outlet unobstructed.
Boiler Overflow Guard 16″ TGDOF1644
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£13.79A compact wire cage that fits around a boiler pressure‑relief or overflow outlet to prevent accidental contact with hot discharge water. The TGDOF843 is made from mild steel with a brown plastic coating and measures 204mm x 102mm x 76mm (8″ x 4″ x 3″). It’s intended for domestic installations, particularly condensing gas boilers where a plastic‑coated finish is recommended.
Boiler Overflow Guard 8″ TGDOF843
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£114.95A compact bronze‑body hot‑water recirculation pump that combines corrosion‑resistant construction with a high‑efficiency permanent‑magnet motor and an automatic differential‑pressure controller. Designed for domestic secondary return loops, it delivers instant hot water to distant outlets while keeping electricity use low (auto‑adapting roughly 5–45 W) and operating quietly.
Best paired with a short‑run timer and a pipe thermostat on the return loop to reduce running hours and avoid unnecessary tank cycling.
Bronze Recirc Pump
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£21.19Tower’s CGDK circular flue terminal guards are simple protective cages for accessible boiler flue terminals. Available in zinc-plated, brown plastic-coated (including high-level mesh versions) and stainless steel, they’re sized to suit common domestic circular terminals and intended to help meet BS 5440-1 and Building Regulations clearance requirements.
Circular Flue Terminal Guards CGDK3
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£16.95Pair of manual corner radiator valves (product code MRVC) finished in hand‑polished chrome. They provide a simple wheel‑head on/off and flow control for radiators where the feed comes from the wall — standard 15mm inlet and 1/2″ BSP radiator tail, rated to 120°C and 10 bar.
Corner Radiator Valves
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£17.50A pair of anthracite-finish manual corner radiator valves (Tower product code MRVC-A) designed for 15mm pipework and 1/2″ BSP radiator inlets. They give a discreet, right-angled connection for wall- or floor-entry pipework and are specified for domestic systems up to 120°C and 10 bar.
Corner Radiator Valves Anthracite
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£3.99A simple pair of manual corner radiator valves from Tower (product code MRVC‑B), finished in black. They are intended for pipework entering from the wall, offer 15mm pipe connections and 1/2″ BSP radiator threads, and are rated to 120°C and 10 bar — suitable as an economical non‑thermostatic option for domestic and light commercial heating systems.
Corner Radiator Valves Black
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£24.95A compact dual‑fuel corner valve set for ladder towel rails that lets the same radiator be served by central heating or an electric element. Brass construction with a polished chrome finish; 15mm compression to the pipes and 1/2″ BSP tails to the radiator. Supplied as an angled valve pair to simplify installation and avoid a separate T‑piece.
DFV – Dual Fuel Valve B0CP2J8NKB
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A compact repair kit for Tower diverter valves intended to replace worn internal parts and restore correct switching between heating and hot water circuits. It’s listed for the Tower trade range (product code DVRK1) and is commonly used on a number of CB and CD series boilers where the symptom is a leaking or sticking diverter valve.
Designed for use by competent heating engineers, it’s a low‑cost spares option that can avoid replacing the whole valve when the fault is internal wear.
DVRK1 Diverter Valve Repair Kit
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£9.99A pair of 90° brass push‑fit valve elbows for neat radiator pipe routing. Available in Chrome, Anthracite and Black, the ELB1 variant adapts 15mm male to 10mm female and ELB2 adapts 15mm male to 15mm female, making them a quick install solution where compact, decorative connections are required.
ELB1 & ELB2 90 Degree Elbows
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£34.79A high‑level terminal guard from Tower (TFC Group) is a simple, regulation‑led protective cover for condensing boiler flue terminals that are within reach. The HLBRM variant is a brown plastic‑coated guard with mesh infill, designed to give physical protection while resisting condensate corrosion better than plain zinc finishes. Choose the correct guard size (for example CGDK3HLBRM or CGDK6HLBRM) to match the terminal and preserve the minimum 50 mm clearance required by BS5440‑1:2008.
High Level Terminal Guards CGDK3HLBRM
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A straightforward family of steel, nitrogen pre‑charged expansion vessels for domestic sealed hot‑water and central‑heating systems. Available in 8 L, 12 L, 19 L and 24 L sizes (product codes EV8, EV12, EV19, EV24), they have 1‑inch connections, a 10 bar maximum working pressure and are intended to stabilise pressure and absorb thermal expansion in small to medium systems.
Hot Water Expansion Vessels EV12
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£59.95A passive, in‑line magnetic and mesh filter for heat‑pump and sealed central‑heating systems. The HPFILT (28mm) uses a 12,000‑gauss removable magnet plus 300µm and 800µm mesh elements to trap ferrous and larger non‑ferrous debris, protecting pumps and heat exchangers and simplifying annual maintenance.
Designed for vertical installation on 28mm return pipework, it includes two Ø28 compression ball‑valves, brass service fittings and a drain‑off for easy cleaning.
HPFILT – Heat Pump Magnetic Filter
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£11.68A compact central‑heating chemical pack containing a concentrated system cleanser and an inhibitor. It’s intended for domestic systems: one 0.5‑litre dose is stated to treat about 100 litres (roughly 10 radiators). Apply via the header tank on open systems or via a radiator on sealed systems.
Before use, confirm compatibility with your boiler and request the supplier’s safety data sheet if the manufacturer is not clearly identified.
Inhibitor & Cleanser Pack
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£36.50A compact in-line magnetic filter for 22mm domestic heating pipework. It uses a 9,000-gauss neodymium magnet plus a mechanical strainer to remove magnetic and larger non‑magnetic debris, and is supplied with 22mm brass compression fittings and a low-level drain for simple servicing.
Best suited to apartments, small bungalows and other space‑constrained installations where a full-size filter would not fit.
MFILT Mini Magnetic Filter MFILT01
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£34.49A compact replacement powerhead for 3‑port mid‑position valves used in domestic Y‑plan heating. The Tower A3MID is a synchronous motor actuator with spring return, a built‑in auxiliary switch and a 1‑metre 5‑core cable; it fits VAL322MP/VAL328MP valve bodies and is commonly used as a like‑for‑like swap for V4073A‑style powerheads.
Mid-Position Valve Actuator A3MID
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£15.99A strap‑on single‑pole changeover thermostat for pipework and hot‑water cylinders, the PCS offers a wide 10–90°C setting range, a fixed ~5°C differential and a 16(4) A switching rating at 250 V AC. It’s built for indoor plant‑room and cupboard use and is intended to switch pumps, valves or auxiliary heating equipment where surface temperature sensing is appropriate.
PCS Pipe / Cylinder Thermostat IP40
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£6.25A simple, clip‑on plastic shroud and matching collar system for tidying visible 15mm radiator and towel‑rail pipework. Available in 130mm, 200mm and 300mm lengths and finished in polished chrome, anthracite, matt black or bright white to coordinate with valves and radiators.
Quick to install and easy to trim on site; collars are supplied for a neat 55mm finishing ring and are available separately in trade packs.
Plastic Pipe Shrouds and Collars
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£21.89A compact 22mm pressure‑reducing valve from the Trade‑Tec (Intatec) range, the PRVG22 reduces mains pressure to protect boilers and hot‑water systems. It comes with a fitted gauge and 15mm reducing adapters, is WRAS‑listed on supplier pages and is factory‑preset (typically to c.3 bar) with an adjustable outlet up to 6 bar — suited to standard domestic and light commercial installations.
Pressure Reducing Valve PRVG22
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£21.19A simple wire‑cage flue guard from the Tower (TFC) TGD family designed to protect rectangular boiler terminals. Available in Zinc & passivated, JS500 (for oil), brown plastic coated (for condensing boilers) and stainless steel finishes — choose the finish to match your flue type and exposure. Confirm the guard size against the terminal dimensions before ordering.
Rectangular Terminal Guards BS5440
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£14.95The Tower SA1/2 is a WRAS‑approved, point-of-use mini expansion vessel (0.16 L) with a 1/2″ BSP connection, pre-charged to 3–3.5 bar. It’s designed to absorb short pressure spikes from fast-closing valves — ideal for installers who need a compact, potable-water solution to reduce water hammer at appliances in tight spaces.
Shock Arrestor
£14.95 View Product
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£7.95A straight brass push‑fit reducer from Tower that adapts 15mm radiator valves or lockshields to 10mm plastic pipe. Available in Chrome (STC1, supplied in pairs), Anthracite (STC1‑A, single) and Black (STC1‑B, single), it’s designed for water‑based central heating and offers quick, tool‑free installation with rated temperature and pressure limits for domestic systems.
STC1, STC1-A & STC1-B Straight Connectors
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£13.50A pair of straight manual radiator valves in hand‑polished chrome (product code MRVMST). They provide simple on/off and flow control for radiators where the supply pipe runs vertically or from the floor and are specified for 15 mm pipe to a 1/2″ BSP radiator connection, with a 120°C / 10 bar maximum rating.
Straight Radiator Valves
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£13.88A twin pack of matt‑black straight manual radiator/towel‑rail valves finished in a round style and made from brass. They use 15mm compression inlets and 1/2″ BSP radiator tails, so they’re a simple, style-conscious replacement for radiators or towel rails with inline or floor‑rising pipework. These are manual valves (not thermostatic) and supplied as a pair.
Straight Radiator Valves Black
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£15.79A simple, mechanical frost‑protection thermostat for domestic heating systems. The Tower STTRFSN V2 uses a sealed bellows and dial to maintain a minimum temperature between −5°C and +15°C, with a 1°C switching differential and volt‑free SPDT contacts for use with boilers and control circuits.
It’s compact, wall‑mounted (60 mm fixing centres) and is best used where you need reliable frost protection rather than programmable or smart heating control.
STTRFSN V2 Room Thermostat
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£14.99A compact, dial‑operated mechanical room thermostat for simple on/off control of domestic heating. It uses a sealed bellows sensor to regulate room temperature between 10°C and 30°C (1°C differential) and is compatible with mains (230V AC) or low‑voltage/volt‑free switching — a low‑cost, robust choice where programmability or smart features aren’t required.
STTRS1 V2 Room Thermostat
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£17.99A simple, dial-operated mechanical room thermostat that switches mains heating at 230 V. The Tower STTRSL uses a sealed bellows sensor for reliable temperature control between 10°C and 30°C, and includes a neon indicator that lights when the heating is on. It’s a low-cost, easy-to-install choice where basic on/off control is sufficient.
STTRSL Room Thermostat
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£11.95A compact, drop‑in synchronous motor intended as a replacement for the motor inside many 2‑port and 3‑port spring‑return valve heads. It uses a standard teardrop mounting and pinion output, runs from 220–240V AC at 50Hz and provides a slow 4 RPM, ~6W output suitable for restoring valve actuation in domestic central‑heating systems.
Synchronous Valve Motor
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£10.34A concentrated chemical treatment intended to reduce boiler noise caused by limescale on a heat exchanger. The 0.5-litre bottle (SKU TRIPCON4) treats a typical domestic system of about 100 litres (roughly 10 radiators) and is intended for use alongside a compatible corrosion inhibitor; it’s non‑acidic, suitable for systems containing aluminium and is designed to be left in the system once dosed.
System Silencer Concentrate TRIPCON4
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£20.59A simple dial room thermostat with a blank tamper cover and a sealed‑bellows sensing element. The Tower STTPRS provides manual temperature control from 10°C to 30°C (1°C differential), is rated at 10(3) A and is designed for wall mounting with 60 mm fixing centres — a low‑cost, robust option where authorised setpoints must be preserved.
Tamper Proof Thermostat
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£21.95A ready-to-fit corner TRV and lockshield pack for through‑the‑wall radiator installations. It supplies a chrome/white thermostatic head, reversible corner valve body, lockshield, 1/2″ BSP tails and 15mm olives so you can tidy a radiator where the pipework exits the wall.
Suitable for most domestic radiators and towel rails; the TRV offers multiple settings with frost protection and the valve body is rated for typical household heating pressures. Check pipe and tail dimensions on site before ordering to be safe.
TCTRVCCW Corner Chrome TRV Pack
£21.95 View Product
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£31.95A compact 15 mm thermostatic mixing valve from TFC Group’s Tower range that blends hot and cold water to a tamper‑resistant set temperature (35–50 °C) with around ±2 °C accuracy. It’s chrome‑plated, supplied with 0.6 mm inlet filters and non‑return valves, and is suitable for typical domestic tempering duties where TMV2/TMV3 certification is not required.
THERMAL MIXING VALVE TMV 15mm TMV2
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£32.95A compact, trade‑grade thermostatic mixing valve with 22mm compression connections that blends hot and cold supplies to an adjustable, tamper‑resistant outlet (35–50°C). It includes 0.6mm inlet filters and non‑return valves and is designed to give stable mixed temperatures (±2°C) when installed within the stated supply temperature and pressure ranges.
Suited to under‑bath, basin or shower feed applications where a dependable, serviceable blending point is required — but not intended as a TMV2/TMV3 certified unit, so check compliance needs before specifying for regulated settings.
THERMAL MIXING VALVE TMV22 22mm
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£5.89A compact brass tee designed for dual‑fuel radiator and towel‑rail installations, the Tower TPC series (TPC‑A Anthracite, TPC‑B Black, TPC‑C Chrome) provides a 1/2″ BSP port for an electric heating element alongside a TRV or blanking plug. O‑ring seals remove the need for PTFE tape; installation can be horizontal or vertical. Electrical connections must be made by a qualified electrician and protected by a 30 mA RCD.
TPC – A, B, C Dual Fuel Tee Pieces
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£42.95A compact magnetic boiler filter supplied in two trade sizes (22 mm and 28 mm). The unit combines a strong 12,000‑gauss neodymium rod and a 530 ml collection chamber in a PA66 (30% glass‑filled) body, and is sold as TC‑Filter (22 mm) or TC‑Filter28 (28 mm). It’s intended to catch ferrous wear particles on the return pipe and is supplied with isolation ball valves and compression fittings for straightforward servicing.
TRADE03 22mm & 28mm Magnetic Filters
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£19.32A chrome TRV and lockshield pack designed for standard domestic radiators, the set provides liquid‑sensor thermostatic control and a matching lockshield that suit 15mm pipework and can accommodate 10mm with reducers. It offers a 7°C–28°C control range, reversible body for flow or return and a tidy chrome finish for simple replacement or new installs.
TRV Pack (chrome) Suit 10mm-15mm TRV2CH
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£19.29A practical TRV and lockshield pair in white (thermostatic head) with chrome bodies, supplied to suit 10 mm or 15 mm pipework. The reversible TRV head (7°C–28°C) and included 10 mm reducer make this a straightforward, low‑cost option for domestic radiator installations or like‑for‑like replacements.
TRV Pack (white) Suit 10mm-15mm TRVPACK
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£21.31A straight thermostatic radiator valve and matching lockshield in polished chrome for 15mm pipework. The mechanical TRV head uses a liquid sensor to regulate room temperature between about 7°C and 28°C, while the lockshield allows the radiator to be balanced by an installer. It’s a simple, trade‑style pack for standard inline radiator connections.
TRV Pack Inline (chrome) EN215
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£18.99A straight inline thermostatic radiator valve and matching lockshield in a white head / chrome body finish, supplied as a twin pack for 10–15 mm pipework. The mechanical TRV uses a liquid-filled sensor (7°C–28°C) and a reversible valve body for fitting on either flow or return; it’s a basic, reliable option for manual per-radiator temperature control.
TRV Pack Inline (white)
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£16.50A trade‑style radiator valve pack containing a liquid‑filled thermostatic head on a reversible angled body, plus a matching chrome lockshield, 1/2″ BSP tails and 15mm olives. It provides simple, local temperature control (≈7–28°C), frost protection and flexible mounting for most standard domestic radiators and towel rails.
TRV4PACK Angled TRV Pack
Central Heating Products, Thermostatic Radiator Valves, TRV & Lockshields, Valves, Motors & Accessories£16.50 View ProductQuick View -
£21.95A complete angled TRV pack in black, the Tower TRV4PACK‑B contains a liquid‑filled thermostatic head, reversible angled valve body and matching lockshield with the fittings to suit 10–15mm radiator pipework. It provides simple, reliable mechanical temperature control (approx. 7°C–28°C) for standard domestic heating systems.
TRV4PACK-B Angled TRV Pack Black
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£21.95A compact anthracite TRV pack that combines a liquid‑filled thermostatic head on a reversible angled brass valve body with a matching lockshield and the fittings needed for most 15mm/1/2″ domestic radiator connections. It offers simple, stable temperature control (0–5 dial, 7–28°C range) and a frost‑protection setting — a tidy choice when matching dark, contemporary radiators or towel rails.
TRV4PACKAN Angled Anthracite TRV Pack
Central Heating Products, Thermostatic Radiator Valves, TRV & Lockshields, Valves, Motors & Accessories£21.95 View ProductQuick View -
£21.95A chrome corner thermostatic radiator valve pack from Tower that supplies a liquid‑filled TRV head, reversible angled valve body, matching corner lockshield and 1/2″ BSP tails with 15mm olives. It’s designed for standard domestic 15mm pipework, offers a 0–5 control range (approx. 7–28°C) plus frost protection, and can be fitted on flow or return in horizontal or vertical orientations.
TRV4PACKC Corner Chrome TRV Pack
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£21.95A black corner thermostatic radiator valve pack that pairs a liquid‑filled TRV head with an angled, reversible valve body and matching corner lockshield. It’s designed for 15mm domestic pipework with 1/2″ BSP tails, offers a control range of about 7°C–28°C with frost protection, and is finished in durable black powder coat for use on contemporary radiators and towel rails.
TRV4PACKC-B Corner Black TRV Pack
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£22.49A corner-mounted thermostatic radiator valve pack finished in anthracite, combining a liquid-sensor TRV head with a reversible angled valve body and matching lockshield. It’s designed for standard 15 mm domestic pipework (1/2″ BSP tails), offers a temperature range of about 7°C–28°C with frost protection, and includes decorator caps and a 10 mm reducer kit for flexible installation.
TRV4PACKCAN Corner Anthracite TRV Pack
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£21.95A complete straight TRV and lockshield pack finished in anthracite, designed for standard 15mm pipework with 1/2″ BSP radiator connections. It uses a liquid‑filled thermostatic head with a 0–5 scale (approx. 7°C–28°C), includes tails, olives and decorator caps, and is intended for professional installation on domestic central‑heating systems.
TRV4PACKSTAN Straight Anthracite TRV Pack
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£24.65A two‑piece radiator valve pack that pairs a TRV2 thermostatic head with an LS1DO lockshield featuring an integrated drain‑off. It’s aimed at conventional pumped central‑heating systems using 10–15 mm pipework and standard 1/2″ BSP tails, and is useful where you want radiator‑level temperature control plus the ability to isolate and drain an individual radiator for maintenance.
TRVPACKDO (with Drain Off)
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£35.95A practical 22mm two‑port motorised zone valve for domestic heating systems with 220–240V AC operation, a low‑power (6W) synchronous actuator and spring‑return fail‑safe action. It includes a 1m pre‑wired 5‑core cable and an auxiliary (end) switch for boiler/pump interlock, making it well suited to standard fully‑pumped central‑heating zones.
VAL222MV Zone Valve 22mm
£35.95 View Product
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£40.95A simple 28mm 2‑port motorised zone valve for domestic and light commercial heating systems. It runs from 220–240V AC, draws about 6 W, and includes a 1 m cable, manual override and a 3 A auxiliary end switch for boiler/pump interlock. The VAL228MV is best where you need reliable on/off zoning and easy replacement or servicing.
VAL228MV Zone Valve 28mm
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£44.95A compact 22 mm 3‑port mid‑position motorised valve for fully pumped domestic heating systems. The VAL322MP uses a low‑power 230/240 V spring‑return actuator with a built‑in switched output to control heating, hot water or both when used with conventional room and cylinder thermostats and a programmer.
It is supplied with a 1 m pre‑wired cable, compression fittings and a manual lever for commissioning; suitable for typical UK homes where pipework and pump head match the valve’s 1 bar differential and 10 bar static ratings.
VAL322MP 3 Port Mid-Position Valve
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£48.95A three‑port mid‑position motorised valve for fully pumped domestic heating systems. The VAL328MP uses a replaceable synchronous actuator and 28mm compression body to route boiler flow to heating, hot water or both; it runs from 220–240V AC, consumes 6W and includes a 1m five‑core cable and manual override for commissioning.
VAL328MP Mid-Position Valve 28mm
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£30.95A compact replacement actuator head for Tower two‑port zone valves (VAL222MV 22mm and VAL228MV 28mm). The A2PORT is a synchronous motor, spring‑return unit with a 1 m 5‑core cable and an auxiliary switch (3 A resistive), designed to be fitted without draining the system.
Zone Valve Actuator 22mm/28mm A2PORT
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