Description
The PRVG22 is a compact, mechanical pressure‑reducing valve intended for domestic and light‑commercial water systems. It reduces and stabilises incoming mains pressure to a safer downstream level, protecting boilers, radiators, valves and sanitary fittings from high supply pressure and pressure fluctuations. The unit is supplied as a 22mm body with 15mm reducing adapters included, and it is fitted with a G¼” gauge port and a pressure gauge as standard so you can confirm the downstream setting at install.
This is a single‑stage, spring‑loaded regulator. Water entering the valve pushes against a seating and diaphragm assembly; the spring tension determines the set outlet pressure. When inlet pressure or flow changes, the mechanism rebalances to maintain the set downstream pressure within its adjustment range. The factory preset is commonly 3 bar, and the outlet is adjustable up to the valve’s maximum setting to suit the requirements of a heating or hot‑water system.
Key specifications
- Model / reference: PRVG22 (Trade‑Tec / Intatec)
- Pipe size: 22mm body (15mm reducing adapters included)
- Adjustment range: adjustable up to 6 bar (factory preset 3 bar).
- Maximum inlet (working) pressure: 16 bar
- Maximum recommended water temperature: listed as up to c.80–85°C
- Gauge connection: G¼” (1/4″ BSP) — gauge supplied as standard
- Approvals / warranty: WRAS approved; 2‑year manufacturer’s warranty on supply listings
How it’s used and where it fits
The PRVG22 is aimed at installers who need a basic, reliable PRV to protect domestic and small commercial heating or hot‑water systems where mains pressure may be high or variable. It is commonly fitted on the incoming cold‑water service ahead of the primary water distribution or the boiler feed. Because the unit includes a gauge and 15mm adapters, it’s convenient for properties with 22mm service pipework that still need 15mm connections elsewhere.
Installation, adjustment and practical notes
Physically the valve is compact and may be fitted vertically or horizontally; where space is tight the small footprint and included reducing set make routing straightforward. The valve is supplied with a pressure gauge fitted into the G¼” port so you can check and adjust the outlet pressure on site. Typical procedure is to isolate and drain the incoming line (or work on a service valve), fit the PRV in the preferred orientation, then set the outlet pressure by turning the adjustment head while monitoring the gauge; many units are factory‑preset to c.3 bar. Integral mesh gauze is used to protect the internal seat from debris but good practice is still to fit an upstream isolating valve and make provisions for flushing or straining the supply if the water contains solids.
Performance, limits and compatibility
Manufacturer technical information records a maximum inlet (operating) pressure of 16 bar and an adjustable outlet up to 6 bar; the factory preset is 3 bar. Maximum water temperature values in supplier paperwork are shown around 80–85°C, so the valve comfortably suits domestic hot‑water systems and most central‑heating circuits but is not intended for continuous high‑temperature process services beyond that range. The PRVG22’s flow data and pressure‑loss curves (published by the manufacturer) should be consulted when sizing for high flow rates — in larger or high‑duty systems you may prefer a PRV specified for higher capacities.
WRAS approval on supplier listings means the valve is suitable for use on potable water supplies in the UK where that approval is required. The 22mm body with 15mm reducing set means it’s versatile across common domestic pipework, but you should confirm the diameter and thread standards of any adjoining fittings prior to purchase.
Advantages and limitations
- Advantages: small, low‑cost regulator supplied with gauge and adaptors; WRAS approved and backed by a simple manufacturer warranty; suitable for both vertical and horizontal fitment.
- Limitations: not a high‑capacity industrial regulator — check flow/pressure‑loss curves for large demands; some published documents show minor differences in the stated minimum adjustable pressure (see warnings below).
In short, the PRVG22 (Trade‑Tec / Intatec) is a practical, off‑the‑shelf PRV for routine domestic and light commercial use where a straightforward, gauge‑equipped regulator is required. It is best chosen where you need a 22mm body with the option to connect 15mm pipework and when WRAS approval and a modest warranty are important to the specification. For installations with unusually high flow demand, elevated operating temperature, or where very fine control is required, compare manufacturer flow curves and consider a higher capacity or more specialist regulator.
Note: this description is based on manufacturer datasheets and authorised supplier product listings for the Trade‑Tec PRVG22 (Intatec). Always confirm the exact part number, operating limits and installation instructions from the product documentation that accompanies your purchased unit before installation.
