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Tub hot looses pressure; cold fine; sink hot/cold fine

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http://boards.diynetwork.com/eve/forums/a/tpc/f/2791013504/m/6483971208

Mar 30, 2014, 08:13 PM
Bripakes
Tub hot looses pressure; cold fine; sink hot/cold fine
Had dripping tub (water was warm). Planned to replace washers and discovered handles were stuck. Decided to replace entire set (central brass). Set was too small so got the needed parts individually. Seats went in fine. Stems went well too. However, turning on the hot has an odd behavior:

-- starts strong then pressure slowly reduces (down to a trickle).
-- opening faucet helps, but pressure reduces again
-- opening up more helps take bath or shower
-- NOT an issue with cold however

Steps to fix:
-- check for debris (removed stem - found nothing)
-- replace stem (issue still the same)

Ideas?

Brian
Mar 30, 2014, 11:20 PM
Jaybee
Check to see if you have a similar high beginning pressure that quickly tapers off in any of your other hot faucets. The longer you have pressure indicates a problem further down the line. If you have other hot faucets with similar symptoms, that tends to confirm the problem is farther away from the faucets.

Most likely place would be at the water heater and the lines going in or out.

However, if the tub is the only hot faucet with this problem, then the problem will be closer to it.


Jaybee
Mar 31, 2014, 12:03 PM
Bripakes
Pressure everywhere else is fine... Even in the same bathroom (the sink next to the tub). Other thoughts?
Mar 31, 2014, 01:11 PM
swschrad
probably there is a little loose piece of... something... in the fixture on the hot side.

what pipe do you have? if it's galvanized iron, you probably kicked a piece of clotted crud loose, and it's telegraphing that the line is full of junk. if so, replace it all. ALL! bwa-ha-ha-haaaaaa! seriously, deposits need to go someplace, and if you replace one section, the crud will plate out on all the rest of the pipe. it will basically clog completely.


sig: if this is a new economy, how come they still want my old-fashioned money?
Mar 31, 2014, 01:24 PM
Jaybee
Yup, just about has to be something caught up in the new faucet.


Jaybee
Mar 31, 2014, 01:32 PM
nona
Yesterdays "ask this old house " addressed just that problem. If you can still get it on a rerun it would pay to see it
Mar 31, 2014, 11:21 PM
swschrad
one way to try and deal with it is to crank down the hot water shutoff, remove the stem of that shower valve, hold a bucket by the stem, and crank open that hot water shutoff. if the crud comes out, you can catch it in a strainer and see what it is. be prepared for a deluge Wink and this is hot water, so take sensible precautions and don't blow more than a bucket full out.

This message has been edited. Last edited by: swschrad,


sig: if this is a new economy, how come they still want my old-fashioned money?
Apr 01, 2014, 07:30 PM
Bripakes
Solved! The "Danco" brand stem was the problem! Got a Central Brass stem from a local plumbing store and the hot works great now!! Thank you everyone for your help.
Apr 01, 2014, 09:17 PM
CommonwealthSparky
quote:
Originally posted by nona:
Yesterdays "ask this old house " addressed just that problem. If you can still get it on a rerun it would pay to see it


Saw that episode nona. Rich Thathewy and his issues with plumbing are an education to watch. Poor guy is always climbing about in close quarters and working up a sweat.


Popeye only reached for the Spinach can as a last resort...