How to Size a Check Valve
- 1). Turn off and disconnect the power source to the pump before attempting to do anything with it to avoid electrical shock.
- 2). Remove the old check valve from the intake if you are replacing it.
- 3). Check the manual of the pump if you still have it, or the specifications for your make and model online. These sources will specify the inlet connection size.
- 4). Measure the inlet pipe or the outlet of the old check valve across the widest point to get the diameter if you cannot locate the specification.
- 5). Write the measurement down and keep it with you so you have a reference when shopping for the new check valve.
