PolyPlumb Double Check Valve 15mm to 28mm

The Polyplumb Double Check Valve lets water pass one way and closes if it tries to come back. It has two check stages in one body, and Push Fit sockets on each end.

Where a Polyplumb Double Check Valve goes

Backflow can pull dirty water into the drinking supply, for example from a hose left in a bucket or a filling loop on a heating system. A double check valve stops that. Typical spots are an outside tap supply, a heating filling point and certain appliances. The Push Fit ends mean no heat near plastic pipe. Fit it so the arrow on the body points the way the water flows.

• Sizes: 15mm and 22mm
• Two check stages in one body
• Polyplumb Push Fit ends
• Arrow on the body shows flow direction

Put it somewhere you can reach later, because check valves can need cleaning or changing. Insert stiffeners in plastic pipe, then push both pipes home to the depth mark. Flush the line before fitting, as grit can stop the valve seating. More Push Fit valves are in our Polyplumb Fittings.

Check valves in Glasgow

Polyplumb check valves are held at 555 South Street, Glasgow G14 0QX. Collect Mon-Fri 8am-5pm or Sat-Sun 8am-1pm, or order online.

Specification

• Brand: Polyplumb
• Range: Polyplumb Push Fit
• Maker code: PB3728
• Connection: Push Fit sockets each end
• Sizes: 15mm and 22mm
• Suitable for: Backflow protection on Polyplumb pipework

Common Questions

Why fit a double check valve?

It stops water flowing backwards into the supply, for example from a hose left in a bucket.

Which way round does a check valve go?

Fit it so the flow arrow on the body follows the water, from the supply towards the outlet. Fitted backwards, it will block the flow.

Does a double check valve need servicing?

It can need cleaning or changing, so fit it where you can reach it, and flush the pipe first.

Datasheets

• Polypipe PolyPlumb Enhanced Installation and Testing Guide (PDF)