Help removing the cover of a shower knob? Can’t find set screw!

The temperature control (small) handle will pull directly off, exposing the innards. I believe on the Delta it is held in place via a rubber "O" ring.

Thanks so much! I figured it might be that easy, but I wasn’t sure. And I didn’t want mess the whole thing up!

chandler48 said:

The temperature control (small) handle will pull directly off, exposing the innards. I believe on the Delta it is held in place via a rubber "O" ring.

Click to expand...

Thats a 1700 series Delta Monitor. The cap on the temp knob pries off. Under that, a screw holds the handle on. Be careful when removing the screw. When the screw is removed, the handle and the temp limit ring will come off. Then slide the outer sleeve off the valve body. Under that there is a large "nut" that needs to be removed. Then the pressure balanced cartridge can be removed. Take the old cartridge with you when going to get the new one. Delta has numerous cartridges depending on the year.
If that large nut doesnt come right off, spray it with WD-40 and tap on the nut all the way around. then try removing it again.

Some of the older 1700 Monitors had 3 small 3/8" pieces of copper tubing holding the front barrel of the valve body to the rear water distribution tee. On these valve bodies, you have to hold back with a second set of Channellocks when taking off the nut.
If you don't hold back, you risk ripping the barrel off the valve body. If that happens, You have to replace the whole valve body in the wall.

Re: Help removing the cover of a shower knob? Can’t find set screw!

Be sure to lubricate all the o-rings on the new cartridge with silicone grease. Petroleum grease will deteriorate rubber o-rings and seals.