Push-Fit Unvented Group Set 22mm | Expansion Vessel Connection | 3 Bar PRV 6 Bar SRV

Description

The Caleffi Push-Fit Unvented Group Set is an all-in-one fitting for unvented hot water storage installations, combining the essential safety and control components into a single push-fit 22mm body. It integrates a pressure reducing valve (PRV), safety relief valve (SRV), integral check valve and expansion vessel connection, reducing the number of separate fittings an installer needs to source and join on site.

A factory-fitted 3/4″ expansion vessel connection simplifies linking the group set to a suitable expansion vessel, while the 22mm push-fit connection allows for a quick, watertight installation without additional jointing compound. The unit is WRAS approved and CPR compliant, supporting a compliant installation under UK Building Regulations Part G3.

3 bar

PRV Factory Setting

6 bar

SRV Factory Setting

16 bar

Max Working Pressure

80°C

Max Operating Temp

22mm

Push-Fit Connection

300μm

Filter Mesh Size

Important Safety Information

Unvented hot water systems must comply with Building Regulations Part G3 and should only be installed, commissioned and serviced by a G3-qualified engineer. The safety relief valve must always discharge via a tundish and suitable pipework in line with the manufacturer's installation instructions.

Please Note

This product was previously listed under a different manufacturer name; it is manufactured by Caleffi. The core specification below (PRV/SRV settings, pressure and temperature ratings) reflects the confirmed listing data for this model — if you require the full manufacturer datasheet for F0001223 specifically, we recommend confirming directly with Caleffi/Altecnic before a critical installation.

Good to Know

The 300-micron stainless steel filter can be removed for cleaning and refitted, helping protect downstream valves and the cylinder from debris without needing to replace the whole unit.

All-in-One Functionality

Combines a PRV, SRV, check valve and filter in a single fitting, cutting down on the number of separate components needed for an unvented installation.

Push-Fit 22mm Connection

Allows for a quick, watertight installation without additional jointing compound or specialist tools.

Expansion Vessel Ready

A factory-fitted 3/4″ connection simplifies linking the group set directly to a compatible expansion vessel.

Non-Adjustable Safety Settings

The PRV is factory set to 3 bar and the SRV to 6 bar, giving consistent, tamper-resistant protection for the cylinder and system.

Removable Filter

The 300-micron stainless steel mesh filter can be taken out for cleaning, keeping maintenance straightforward over the life of the installation.

WRAS Approved

Manufactured to comply with WRAS and UK safety standards for potable hot water system components, and CPR compliant.

Valve Specification

Manufacturer

Caleffi

Manufacturer part code

F0001223

Connection

22mm push-fit (main), 3/4″ expansion vessel connection

PRV factory setting

3 bar

SRV factory setting

6 bar

Max. working pressure

16 bar

Max. operating temperature

80°C

Filter

300 micron stainless steel, removable

Valve type

Non-adjustable

Body material

Brass and engineering plastic

Approval

WRAS, CPR compliant

Weight

Approx. 628g

Dimensions (L x W x H)

134 x 100 x 110mm

Included Parts

Included

22mm push-fit unvented group set body, 3 bar non-adjustable PRV, 6 bar factory-set SRV, integral check valve, removable 300-micron filter, 3/4″ expansion vessel connection, installation guide

What does this group set include?

It combines a non-adjustable 3 bar pressure reducing valve, a 6 bar safety relief valve, an integral check valve and a removable 300-micron filter in a single 22mm push-fit fitting, along with a 3/4″ expansion vessel connection.

Does it come with an expansion vessel?

No. The unit has a factory-fitted 3/4″ connection for linking to a suitable expansion vessel, but the vessel itself is supplied separately.

Can the PRV or SRV settings be adjusted?

No, both are factory set and non-adjustable: the PRV at 3 bar and the SRV at 6 bar.

Is a tundish included?

No. A tundish is required for safety relief valve discharge under Building Regulations Part G3 but is not included with this unit, so it should be sourced and fitted separately.

Who can install an unvented group set like this?

Unvented hot water systems fall under Building Regulations Part G3 in England and Wales, so installation and commissioning should only be carried out by a G3-qualified engineer.

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