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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
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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
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£5.79A compact, low‑cost intermediate wiring box designed for heating control wiring. The Tower (TFC Group) JB6W provides six double screw terminals (rated 10 A) and accepts conductors up to 2 × 1.5 mm²; it’s intended for neat termination of multi‑core thermostat, programmer and valve wiring in indoor installations.
6 Way Wiring Centre
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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
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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
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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″
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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″
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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
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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
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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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£19.95A family of simple, reliable mechanical 24‑hour timer modules from TFC Group’s Optimum FM/1 range, supplied in several tab‑orientation variants so they’ll plug straight into many Baxi, Potterton, Alpha and Ideal boilers. They use a 24‑hour dial with 96 tappets, provide volt‑free changeover switching and a manual ON/Auto/OFF override — a low‑cost, proven spare for restoring original timed control.
FM Timer Module Variants
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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
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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
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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
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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
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£52.95A compact Wi‑Fi time switch intended to add smartphone and voice control to an existing boiler or immersion heater. It offers up to 15 on/off programmes (1‑minute minimum), a manual override button, volt‑free SPDT switching and connection via the Smart Life app (2.4 GHz Wi‑Fi). Suited to simple retrofit use where timed switching — not temperature modulation — is required.
OP-BM-IHTWF01 Wi-Fi Boiler Module
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£35.99A compact 7‑day digital fused‑spur timer for single‑gang pattress installation, offering 24 on/off events, a double‑pole isolator and a removable BS1362 13 A fuse caddy. It’s designed for permanently wired resistive loads (13 A) and includes an internal rechargeable cell (≈200 hours) to retain settings during power loss.
OP-DFST Socket Box Fused Spur Timer
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A compact single‑module DIN‑rail digital timer for simple 7‑day or 24‑hour scheduling. The OP‑DIN offers six ON / six OFF events, an LCD for programming, rechargeable backup (≈100 hours) to retain clock and programmes during power loss, and a 16 A resistive switching contact — a neat, space‑saving choice for panel‑mounted lighting or heating control where sophisticated networking or heavy inductive switching is not required.
OP-DIN 1 Module 1CH Time Switch
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£41.95A compact DIN‑rail Wi‑Fi timeswitch for a single mains output, the Optimum OP‑DRWF01 gives 24‑hour and 7‑day scheduling via an iOS/Android app, internet time synchronisation and Alexa/Google Home voice control. It’s aimed at domestic and light‑commercial use where a discreet, in‑board timer is needed for heating circuits, pumps, fans or lighting, provided the loads are within the 16 A resistive / 4 A inductive ratings.
OP-DRWF01 Wi-Fi DIN Rail Timer
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A compact, one‑button socket‑box boost timer by Optimum (TFC Group) that delivers four pre‑set timed mains boosts — 15, 30, 60 or 120 minutes — for resistive heating appliances. It’s rated for 16 A resistive switching, fits a standard pattress box and uses LED indication and quartz timing for clear, accurate on‑demand control.
OP-EBT2 Socket Box Electronic Boost Timer
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£66.95A straightforward mechanical 24‑hour immersion heater timer for Economy‑style tariffs. The Optimum OP‑ECOSAVE switches single, dual or twin immersion elements during off‑peak periods, offers a selectable 15–120 minute boost, and includes clear indicator lamps, a manual on/off override and a 72‑hour running reserve.
It’s a simple, electrician‑fitted solution when you want reliable timed hot‑water control without smart features.
OP-ECOSAVE Immersion Heater & Economy 7 Timer
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£15.79A compact 24‑hour synchronous plug‑in timer module for repeatable daily scheduling. The OP‑FM1STU00 uses 15‑minute captive tappets to control a single volt‑free SPDT output and is designed as a direct replacement for many wall‑hung boiler programmers and sub‑panel time‑switch applications. This variant has no manual override.
OP-FM1STU00 Timer Module 24 Hour
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£14.95A compact 24‑hour synchronous plug‑in timer module designed as a drop‑in replacement for many wall‑hung boilers and control panels. It uses captive 15‑minute tappets and a three‑position manual override (timed / fixed‑on / fixed‑off), and provides a volt‑free SPDT contact rated 16 A resistive / 8 A inductive for simple daily scheduling.
OP-FM1STUH0 Module With Override
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A compact, battery‑powered programmable thermostat with capacitive touch controls and a clear backlit screen. The Optimum Vibe OP‑HWSTAT offers six user‑adjustable periods per day, volt‑free switching for broad boiler compatibility and adjustable frost protection — a straightforward option where local scheduled control is required but Wi‑Fi or smart features are not.
OP-HWSTAT Digital Room Thermostat
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£37.99A compact digital timeswitch for immersion heaters and general purpose switching, offering 24‑hour and 7‑day programming with 1‑minute resolution and up to 24 ON/OFF events. It uses volt‑free SPDT contacts (removable link for direct immersion wiring), runs from 220–240V AC and is rated 16A resistive / 4A inductive — a straightforward local controller where predictable, timer‑based operation is required without smart features.
OP-IHTDIGI Digital Immersion Timeswitch
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£22.50A simple, surface‑mounted 24‑hour mechanical timer for immersion heaters and general‑purpose switching. It offers 15‑minute tappet intervals, SPDT volt‑free contacts with a removable link for mains switching, a three‑position manual override and ratings of 16 A resistive / 8 A inductive.
Suited to basic daily scheduling of hot‑water heaters and similar loads in dry indoor locations; not for direct switching of LED or discharge lighting without a contactor.
OP-IHTGPT 24 hour Immersion Timer
£22.50 View Product
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A surface‑mounted mechanical 7‑day timer for immersion heaters and general‑purpose loads. The OP‑IHTGPW uses captive tappets on a weekly dial (2‑hour intervals), has a three‑position override and volt‑free SPDT contacts (link removable). It’s rated 16 A resistive / 8 A inductive and is intended for simple, reliable weekly scheduling rather than fine or smart control.
OP-IHTGPW 7 Day Immersion Timer
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£44.99A compact, pattress‑mounted digital timeswitch for routine mains control. The OP‑S BSDIGI offers 24‑hour and full 7‑day programming with 24 on/off events, 1‑minute resolution, Random and Countdown modes, and a volt‑free changeover contact so it can directly handle resistive loads or drive a contactor for larger or inductive loads.
It’s a straightforward choice where accurate scheduled switching is required indoors—heating, simple pumps and similar domestic applications—provided you respect the load type and the manufacturer’s guidance on switching LED or discharge lighting.
OP-SBSDIGI Digital Socket Box Timer
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£16.99A compact 24‑hour mechanical timer that mounts over a single pattress box and uses 15‑minute captive tappets to create daily on/off schedules. It provides volt‑free SPDT switching (16 A resistive, 8 A inductive) and a Timed/OFF/Constant override — useful for simple domestic or light‑commercial timing tasks where straightforward, repeatable daily control is required.
OP-SBST 24 Hour Socket Box Timer
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A mechanical 24‑hour captive‑tappet timer intended for mounting on a single pattress box and driven by a 24V DC motor. It offers 15‑minute programming intervals, a volt‑free SPDT changeover contact (16A resistive / 8A inductive) and a Timed/OFF/Constant manual override — typically used to schedule 24V heating and control circuits where a simple, repeatable daily schedule is required.
OP-SBST24V 24V Socket Box Timer
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£26.39A mechanical 7‑day pattress‑box timeswitch with captive two‑hour tappets and a simple Timed / ON / OFF override. It supplies volt‑free SPDT switching and is rated for 16 A resistive (8 A inductive), which makes it a straightforward choice for basic weekly schedules on domestic or light‑commercial circuits where two‑hour steps are acceptable.
OP-SBSW 7 Day Socket Box Timer
£26.39 View Product
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£39.95A single‑gang, Wi‑Fi enabled socket‑box timeswitch that fits a standard pattress. The OP‑SBWF01 provides Smart Life app and voice control, 24‑hour or 7‑day scheduling with up to 15 on/off programmes and a volt‑free SPDT contact rated 16 A resistive (4 A inductive). It’s suited to internal domestic or light‑commercial control where neat wall mounting and app‑based scheduling are required.
OP-SBWF01 Wi-Fi Socket Box Timer
£39.95 View Product
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£57.49A compact wall‑mounted two‑channel Wi‑Fi timeswitch (Optimum OP‑SBWF02) that fits a standard single pattress box and provides two independently scheduled 230V outputs. It’s aimed at domestic and light commercial uses where remote app control, local override buttons and voice assistant integration are useful — but note the modest 5A per‑channel rating and indoor‑only installation requirement.
OP-SBWF02 Wi-Fi Socket Box Timer
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£57.49A compact, pattress‑mounted 3‑channel Wi‑Fi timeswitch (model OP‑SBWF03) that gives independent scheduling and manual override for three 230V outputs. It’s designed for domestic and light commercial use — ideal for hot water and multi‑zone heating control or small pumps — but each channel is limited to 5 A resistive so heavier or inductive loads will need a contactor.
OP-SBWF03 Wi-Fi Socket Box Timer
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A simple plug‑in 24‑hour captive‑tappet timer that provides repeatable on/off control in 15‑minute steps via a BS1363 shuttered socket. Mains‑synchronised, low power consumption and fitted with a three‑position manual override; best for routine daily control of resistive domestic loads or as a low‑voltage controller for a contactor where higher currents are present.
OP-TIP1000 24 Hour Plug-In Timer
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