Our kitchen sink has a spray hose. Some months back, I replaced the head as
the old one was clogged with sediment from our hard water. Since I've
replaced the head, there is a regular thumping noise whenever I run the
water through the faucet. I can feel the hose move when there's a thump. The
flow through the faucet is steady, however.
The spray hose itself works fine. When you turn it on, there's one thump but
then it flows steadily and quietly.
I can't figure out what might be causing this. I could understand one thump;
something in the new head springs back when the pressure in the pipes is
lowered as the water flows out the faucet then reaches an equilibrium point
to match the new internal water pressure. From the intensity of the thump,
it seems as though the flow through the faucet would be interrupted each
time a thump is triggered but it isn't.
Hydraulic hammers are usually triggered when the water stops flowing, not
when it starts, so I ruled that out.
Maybe the original owner of the house was very attached to that spray head
and is haunting the sink since I replaced it.
It's not a major problem and it would probably be solved if I bought a new
spray head for the hose but it's driving me crazy trying to figure out why
it's happening. Does anyone have a logical explanation?