• Easy Way to Regulate Pressure
• Anti-Scalding Protection with the Heatguard® TMV3-8
• Versatile new RPZ valve design
• All-In-One Reliance Tenant Valve Assembly
• New Sealed System Kit Filling Loop
• New Underfloor Heating Tempering Valves from Reliance®
• TMV3 Approval For Showering Safe
• Reliance® Adds Tectite® Connection Options To TMV3 Range
• Follow Garden Tap Regulations

A new addition to the pressure-reducing valves range from Reliance Water Controls is the Easiset™ 320 series, aimed mainly at the domestic market. The most striking feature of these valves is their lift-and-turn mechanism, which allows for easy adjustment of downstream pressure to a set maximum, after which the valve cap is simply pushed down again to lock in place.

This feature eliminates the need for cover caps and for any adjustment screws, which can be difficult to reach. With ease of servicing and maintenance being as important in domestic as in commercial properties, the valves also incorporate the company's patented one-piece cartridge with serviceable strainer and there is a pressure-gauge test-point for downstream reading.

Other features include: multi-media applications such as water, light oil, gas, etc, design for high flow-rates, manufacture to DIN15 and 20, low noise, high quality and cost-effective pricing. Sizes are 1/2 inch and 3/4 inch and 15mm and 22mm. The valves are for use with pressures up to 16 bar; cold water models are available for temperatures up to 45ºC while hot water models are suitable up to 80ºC.

For further product information and specification sheet, click here.

Published March - July 2006

For further product information and specification sheet, click here.

November 2005

The latest Floguard RPZ (reduced pressure zone) valve from Reliance Water Controls supersedes its previous model and gives protection against back-siphonage and back-pressure risks to potable water supplies. Compact, while easy to install and service, it avoids contamination from fluids up to and including category 4, and can be fitted in relatively confined spaces.

Conforming with BS EN 1717, the valve suits a wide range of applications, including use on swimming pools, healthcare baths, disinfection processes, anti-freeze fire sprinklers, chemical mixing facilities, dry-cleaning, dyeing, car washing, film developing, printing and photographic processing, bottle-washing, water treatment, irrigation systems with additives, non-domestic heating systems with inhibitors, laboratories, etc.

The unit has controllable upstream, intermediate and downstream pressure zones, each with a ball valve to verify both function and the tightness of the check valves. When no water is drawn off, both check valves are open and the discharge valve is closed. The latter opens when the differential pressure between the upstream and intermediate zones has dropped to 0.14 bar.

Isolating valves are recommended for ease of annual maintenance: models are available with or without them. Parts include a gunmetal body, unique one piece cartridge type construction to aid servicing and reduce downtime, integral stainless steel strainer, test cocks, tundish and plug, plus a cartridge and cap removal tool is supplied. Spares are available and sizes include half, three-quarter and one inch, with large internal waterways to minimise pressure drop. WRAS approval applies.

For installation, maximum upstream pressure is 10 bar and minimum inlet pressure 1.5 bar. Mounting is horizontal, with the valve facing downward, and the maximum operating temperature is 65 degrees centigrade. Access for maintenance and inspection is required, plus ventilation, and risks of flooding or freezing should be avoided.

Advent of this new Floguard RPZ valve is expected to lead to growth in the market for such devices, as it overcomes the drawbacks of previously available units. For warranty purposes, installation and maintenance can only be carried out by authorised installers after application to water suppliers, with commissioning and testing by trained and accredited testing personnel. Details of available training can be obtained from Reliance Water Controls.

For further product information and specification sheet, click here.

April 2004

The Tenant Valve Assembly™ from Reliance Water Controls is designed to control the incoming water services to a block of flats, offices or any other building with multiple units. It is an ideal package for saving both space and labour in such applications.

The assembly comprises an isolating ball valve, pressure reducing valve, double check valve and single-jet water meter. It comes complete with easy 22 or 28mm compression connections and - to prevent condensation and heat transfer between pipes - a moulded, insulated protection box with identity labels. A blanking piece, which fits between flat-faced union connections, replaces the control pack for system flushing.

The isolating ball valve is made of scale-proof materials to give a long life-span without seizing up. This valve also has an extended lever, which protrudes from the surrounding insulated cover for easy access, to turn the system on or off without removing the insulation box.

The pressure reducing valve is the 315 Series Dial-up type, adjustable between 1.5 and 6 bar. It features high flow rates, low noise and one-piece, cartridge construction.

The single-jet water meter has a magnetic coupling to the turbine and a 360-degree rotatable counter for easy readout, no matter in what orientation the assembly is installed. Being pulse-output retrofittable, this meter can be connected, using a pulse output clip-on cap, to a stand-alone pulse counter or a building management system. (In late 2003, a clip-on radio transmitter cap will be available for wireless transmission of water consumption.)

Both the pressure reducing valve and the water meter can have high-temperature cartridges in the body of the assembly for use in hot water systems up to 90 degrees C.

The first check valve element is fitted between the pressure reducing valve and the water meter. Access to it for servicing, or for verifying its function, can be gained by first removing the single-piece pressure reducing valve cartridge, after which the first check valve is easily removed.

The second check valve element is fitted downstream of the water meter and a test-point can be accessed with ease from the outlet end of the assembly. The test-point allows for function verification and a convenient way to test pressures, temperatures and, if required, a means for injecting chemicals into the system for disinfection.

Published August - October 2003

Reliance Water Controls has added the Filmaster® DI 15mm filling loop (product code FIBV 246 208) to its Easifit Controls Kit EASI 209 100 for sealed systems to ensure compliance with the 1999 Water Supply (Water Fittings) Regulations for England and Wales and the 2000 Water Byelaws for Scotland.

Under the earlier byelaws, now superseded, there was a risk that the 15mm compression outlet from the isolating valve might be used for purposes other than the sealed system and therefore would also require backflow prevention. The new filling loop, as now prescribed, has two isolators, one is a separate ball valve while the other, which is connected to the mains, is a combination isolator and verifiable double check valve. A 400mm braided hose with thumb connectors and blanking caps are also provided.

Reliance Water Controls has added the Filmaster® DI 15mm filling loop (product code FIBV 246 208) to its Easifit Controls Kit EASI 209 100 for sealed systems to ensure compliance with the 1999 Water Supply (Water Fittings) Regulations for England and Wales and the 2000 Water Byelaws for Scotland.

Under the earlier byelaws, now superseded, there was a risk that the 15mm compression outlet from the isolating valve might be used for purposes other than the sealed system and therefore would also require backflow prevention. The new filling loop, as now prescribed, has two isolators, one is a separate ball valve while the other, which is connected to the mains, is a combination isolator and verifiable double check valve. A 400mm braided hose with thumb connectors and blanking caps are also provided.

The Easifit Kit with new filling loop offers an easy way to exploit current growth in sealed heating systems. Popular in newbuild, they can also be used in refurbishment and for converting an open-vented to a sealed system. The kit is easy to install, provided the boiler concerned is suitably approved and has a high-limit thermostat, and Reliance can advise on expansion vessel kit sizing and availability if required.

Easifit Kit components, in addition to the new filling loop, include: a cost-effective, unique manifold with multi-connections for easy installation and maintenance; an easily serviced, replaceable pressure-relief cartridge integrated into the manifold, the removal of which allows a fouled seating to be easily cleaned; a pressure gauge to indicate any developing faults; an inlet connection for the filling loop and a connection to the heating system.

Advantages of sealed systems include: they save much in materials, work and therefore both time and cost; leave more space free in dry lofts; eliminate air ingress corrosion, freezing and bursting risks; avoid pumping over or localised boiling; give faster space heating; and extend system life by obviating harmful deposits, oxidation and tank contamination.

Published March 2003

With fast growth continuing in underfloor heating, Reliance Water Controls now offers two sizes of thermostatic tempering valve to stabilise heating system temperatures by blending flow and return water supplies.

The Heatguard® UFH 22mm valve (product code HEAT 219 058) suits heating areas up to 150m2, with a flow-rate of 38 litres/min at 1.0 bar, while the Heatguard® UFH 28mm valve (product code HEAT 115 002) suits heating areas up to 250m2, with a flow-rate of 58 litres/min at 1.0 bar. Minimum flow-rate for the 22mm valve is 5 litres/min, and for the 28mm valve 9 litres/min.


Providing fast thermostatic reaction, nominal temperature stability with the 22mm valve is within ±2oC, and with the 28mm valve within ±3oC. With a maximum flow temperature of 85oC, and return temperatures ranging from 5oC to 75oC, the outlet temperature can either be adjustable by the user between 35oC and 60oC, or set and locked, thus offering flexibility.

Both valves comply with BS EN 1287 (formerly BS1415 pt 2). Maximum dynamic working pressure is 6.0 bar, while maximum static working pressures are 10.0 bar for the 22mm valve and 16.0 bar for the 28mm valve.

Reliance can also supply complete manifold systems to suit individual requirements, control packs and other underfloor heating items, as part of a wide range of products which include thermostatic mixing valves, components for unvented systems, pressure-reducing valves, showering systems and many other heating and plumbing lines.

Published March 2003

Reliance Water Controls® has won TMV3 approval for its Heatguard® DC153 dual-control thermostatic shower, confirming compliance with NHS model engineering specification DO8, HP-S and LP-SE designations (Certificate No. ETC/195/1202. The exposed valve is available, along with a modern shower accessories kit, in specifications, configurations and finishes (chrome, white or mixed) to suit all environments.

Features and benefits include: compact modern design, user-friendly dual controls and lever handles for temperature and flow, one-piece thermostatic and flow control cartridges for easy servicing (spares available), sensitive thermostatic element for quick reaction to supply changes, rapid shut-off if either the hot or cold supply fails, high flow rates at low pressures to suit all domestic hot water systems, integral easy-fit bracket system and 15mm push-fittings for easy installation.

This Type 3 shower is safe to use in hospitals, nursing homes, sheltered housing or any other premises where people are deemed by risk assessment to be in danger of scalding by hot water, with maximum temperature of 41°C. The complementary shower kit has a quick-release five-mode head, acrylic soap dish and chrome hose with 11mm bore. Flow-rate is 8 litres/min at 0.1 bar.

Valve installation is further facilitated by push-fit connections on inlet elbows, which can be turned to serve rising or falling supplies – full-bore barrel type strainers are also included. Top or bottom outlets can be selected on site and a blanking plug is provided for closing off the unused outlet. The outlet fitting is removable and reversible so that compression or flat-face fittings can be used.

Published February 2003

Reliance Water Controls has added more connection formats to its Heatguard® TMV3-8 thermostatic mixing valves, already arguably the most advanced in their class on the market.

Both the 4in1 (product code HEAT 160 045) and 2in1 (HEAT 160 040) versions now come with 15mm Tectite® (supplied by Yorkshire Fittings Ltd) push-fit connections.

Tectite® further enhances Heatguard’s® applications versatility – ideal for a wide range of premises with its TMV3 approval to the National Health Service D08 standard for both high and low-pressure showers, basins and bidets, and for high-pressure bath-filling. The push-fit fitting can be used with plain copper tube to EN1057 and certain types of polybutylene (PB) to BS7291 part 2 and cross-linked polyethylene (PEX) plastic tube to BS7291 part 2.


2in1 Heatguards® incorporate non-return valves and strainers, while 4in1 versions add isolaters and test-points. Tectite® offers a sound, reliable, mechanical joint and easy installation of pipework in confined spaces because, once pushed onto the tube, the fitting can be easily rotated.

The push-fit fitting does not need the use of any solder or heat and can be installed safely where the use of a naked flame could be dangerous. Another advantage is that they can be disconnected and reused. Unlike others of its type, it is tamper proof, as you need to use a special disconnecting tool. Reliance supplies a plastic disconnecting clip free of charge with these products should occasional reuse be required, or they can supply a metal disconnecting tool as an optional extra. To avoid possible dezincification, the fittings are made of DZR brass. When used correctly with copper tubes to BS2871 part 1/EN1057, the Heatguard® TMV3 Tectite® can withstand 16 bar pressure at 30°C, 10 bar at 65°C and 6 bar at 90°C for sustained operation where pressures are ‘non-shock’. For applications with polybutylene or cross-linked polyethylene, the tube manufacturers’ maximum permissible pressure and temperature ratings should be followed.

Published August 2002

Reliance Water Controls has the products and the advice installers need when fitting new or replacement garden taps under the WRAS Water Supply (Water Fittings) Regulations 1999 now current.

The main focus now is on the company's HTAP 218 Hoseguard Bib Tap Kit. This fully meets the requirements for new housing and also refurbishment work, although a second option for existing houses is still available with the HTAP 217.

The HTAP 218 kit includes a three-in-one double check valve, with integrated quarter-turn lever-handled ball valve for

isolation, plus test point and drain-down facility, to be fitted inside a building, as prescribed, to avoid freezing. The quarter-turn, lever-handled tap fits into a through-wall externally fitted unique wall-plate featuring an integrated compression joint for easy installation, with an additional safety locknut for protection against loosening caused by tugging hoses.

Suitable for class 3 contamination risks Type EC, the three-part kit is made and tested to high quality standards, guaranteed for a year in addition to any statutory rights, with WRAS approval pending.

For applications in existing houses where the HTAP 218 may be less easy to install, Reliance continues to supply the HTAP 217 permissible under the regulations. The HTAP 217, known as Backflow Device Type HUK1, incorporates a double check valve but does not offer the same frost protection as the HTAP 218 kit.

Published May 2002