Jump to content

No water flow

Jerry Simon

Recommended Posts

Water heater supply line valve shut-off. Got cold water flow to all sink faucets and to toilets. No hot or cold to tub or shower. Valve turned on, and flow everywhere. Why no cold flow at tub and shower when water heater supply line valve off?

Is this a quirk of anti-scald devices at tub & shower?

It's a pressure balancing shower valve. They've been required for a long time. I'm not even sure if you can get one that isn't pressure balancing anymore.

It equalized the pressure on the hot and cold sides in real time. So, if you're showering and someone flushes a toilet, the reduction in pressure in the cold side causes the valve to match the same pressure on the hot side. As a result, you don't get scalded. Instead, you just see a reduction in flow on both sides. If the pressure on either side drops to zero, it brings the pressure on the other side down to zero as well.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...