Check Valves

Check Valves and Combined Flow Restrictors

Prevent reverse flow in showers and pipework. Review DB and DT for internal installation and service access.

Product Selection

Compare Uses and Structures

Selection Notes

What Guides the Choice

Required functions

Separate backflow prevention from the need to limit forward flow.

Cavity depth

Review internal fit, sealing position and removal access before confirming the model.

Removal access

For regular cleaning, check whether the complete assembly provides a removal path.

Assembly fit

Confirm direction, sealing and supply conditions with a sample, rather than diameter alone.