Moen MCore little pressure full hot or cold

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Steveko

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Hello!
We installed a moen U232cxs with a diverter recently. The pressure on full hot or full cold is about half but in the middle for warm it is fine. It affects the tub shower and wand so it’s definitely a problem in the valve assembly.

Moen has sent a new 1213 cartridge which has not solved the problem.

Has anyone had this issue? The rest of the faucets in the house are fine and I don’t believe it’s a pipe issue because it affects both hot and cold the same.

Any help is appreciated. The valve is on an outside wall and would be a terrible thing to have to replace.
 

John Gayewski

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Your pipe is likely undersized for your given pressure.

When mixed your getting full flow, but change to all cold or all hot your only getting flow from one side and the flow is reduced. This happens on most valves. It's usually noticeable but not a problem. If it's a problem it's likley a problem in the piping with a restriction or low pressure.

Check if there are stops.
 

Michael Young

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Hello!
We installed a moen U232cxs with a diverter recently. The pressure on full hot or full cold is about half but in the middle for warm it is fine. It affects the tub shower and wand so it’s definitely a problem in the valve assembly.

Moen has sent a new 1213 cartridge which has not solved the problem.

Has anyone had this issue? The rest of the faucets in the house are fine and I don’t believe it’s a pipe issue because it affects both hot and cold the same.

Any help is appreciated. The valve is on an outside wall and would be a terrible thing to have to replace.

Take the cartridge out of the valve body. Have a second person turn the water on (start at about 1/8th of a turn and ease the pressure up. While your helper controls the water, watch the two ports in the brass body. They should be blowing water out both sides. if you have lousy flow or no-flow, get some extra-long pipe cleaners and work them down the hot and cold ports; attempting to dislodge anything that might be blocking flow. close your shower curtain and work with the water in the ON (only slightly on). If you're lucky, you'll dislodge the obstruction.

If that doesn't solve your problem, you'll probably need to replace the valve. If you have to replace the valve, you can do so from THE FRONT SIDE using a Delta RP29827 Renovation Plate. if you have a crawlspace, it will be easier to transition underneath and push your hot and cold up from the bottom. The Renovation Plate is cool, but doesn't give you a whole lot of room to work.

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