A friend of mine just asked me if I could replace a faulty tap washer for her. But when she described the problem I wasn't sure if it was simply the washer that's to blame.
When she closes the tap, she meets resistance at the end of its travel, and though the water slows it doesn't stop. But if she then tries to close the tap even further, it passes the point of resistance and rotates freely again, and the water flow returns to maximum.
Is the tap itself due for replacement, or is it in fact the washer?
Many thanks,
Bert