Spare parts

Many leaks trace back to a worn washer or seal, so the right size matters more than anything else. Tap washers are quoted by diameter and thickness, O-rings by inside diameter, cross-section and material such as nitrile or EPDM, valve spares by valve type and size, and pump spares by the model and part number on the nameplate. Photographs and old parts help, and quantities are needed for a quotation.