28mm Heat Pump Isolation Valve | HZK-0V-0000028 | Brass Ball Valve

Description

This 28mm Heat Pump Isolation Valve is a high-quality brass ball valve built for air source heat pump pipework, allowing the pump or heating circuit to be isolated for maintenance or replacement without draining the entire system. A built-in mesh filter also protects downstream pumps and components from debris and contaminants circulating in the water.

The valve combines two functions in one compact fitting: a quarter-turn lever ball valve for fast, reliable isolation, and an integrated 400-500 micron mesh filter that can be accessed and cleaned from the side without removing the valve from the pipework. Rated to PN25 (approx. 25 bar) and built in solid brass, it's sized for standard 28mm heat pump connections.

28mm

Connection Size

PN25

Pressure Rating

-10°C to 90°C

Temperature Range

400-500

Mesh Micron Rating

Brass

Body Material

0.7kg

Weight

Isolate Without Draining the System

The quarter-turn lever handle allows the heat pump or a section of pipework to be isolated quickly for servicing or replacement, without needing to drain the wider heating circuit - saving time and reducing mess on routine maintenance visits.

Built-In Filter Needs Periodic Cleaning

The integrated mesh filter protects the heat pump and downstream components from debris, but like any in-line filter it should be checked and cleaned periodically as part of routine system maintenance to maintain flow and filtration performance.

Integrated Mesh Filter

A 400-500 micron mesh filter is built into the valve body, catching debris before it can reach and damage the heat pump's pump or heat exchanger.

Quarter-Turn Isolation

The lever handle ball valve gives fast, positive isolation with a simple quarter turn, rather than the multiple turns needed on a gate valve.

Solid Brass Construction

Built from solid brass for durability and corrosion resistance under typical heating system water conditions.

Side-Access Filter Cleaning

The mesh filter is removable and cleanable via side access, without disconnecting the valve from the surrounding pipework.

High Pressure Rating

Rated to PN25 (approximately 25 bar), comfortably exceeding the working pressures found in domestic and commercial heat pump systems.

Wide Operating Temperature Range

Operates across -10°C to 90°C, covering both the cold water side and the elevated flow temperatures a heat pump can produce.

Valve Details

Valve Type

28mm ball valve with integrated mesh filter

Material

Solid brass

Connection Size

28mm compression fittings

Handle Type

Lever handle, quarter-turn operation

Filter Rating

Typically 400-500 micron mesh

Performance

Pressure Rating

PN25 (approx. 25 bar)

Temperature Range

-10°C to 90°C

Physical Details

Length

Approx. 167 mm

Height

Approx. 89 mm

Width

Approx. 61 mm

Weight

Approx. 0.7 kg

Can I service my heat pump without draining the whole system?

Yes. This valve's quarter-turn lever handle isolates the pump or heating circuit immediately, so you can carry out maintenance or replace components without draining the entire system.

How do I clean the built-in filter?

The mesh filter is accessed from the side of the valve body and can be removed for cleaning without disconnecting the valve from the pipework - no need to drain the system to service the filter.

What size pipework does this valve fit?

This valve is sized for standard 28mm compression fittings, matching the flow and return connections typically used on heat pump outdoor units and pipework.

What pressure and temperature is this valve rated for?

It carries a PN25 (approximately 25 bar) pressure rating and operates across -10°C to 90°C, comfortably covering the conditions found in domestic and commercial heat pump installations.

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