Some weeks ago my bathroom shower faucet froze.  It’s a single knob type…you it pull outward to adjust the flow, and turn it clockwise or counter-clockwise to adjust the temperature.  One morning as I was getting ready to take a shower I pulled the knob outward and it simply stopped moving.  Luckily it froze in the off position and there was no pouring water emergency to deal with.  So for the past several weeks I’ve been using the shower in the basement, while I hemmed and hawed over whether to fix the upstairs one myself, or call a plumber.

My upstairs shower adjoins a closet which hides a trap door, which gives me access to the pipes that service the shower and the bathtub.  Normally there are shutoff valves located there, but my shower had none.  So one motive for calling in a plumber would be to have shutoff valves installed.  Even that would be something I could theoretically do myself.  It’s not like soldering copper pipes is any magic art…in the past I’ve helped friends do that in their own houses.  But the space behind my bathtub is tight, and I wasn’t sure I wanted to fuss with it.

So I thought about it and thought about it, and shopped for propane soldering tools and read various manuals on how to fix shower faucets.  And then it occurred to me that there might be shutoff valves down in the basement somewhere, before the pipes took a turn to the upper floors.  You’d think after owning the house for seven years I’d have had all the plumbing here mapped out by now, and I did have a general sense of how it was all laid out.  But I hadn’t actually taken an inventory of all the shutoff valves, just an ad hock survey.  I knew where the shutoff valves were to the kitchen sink and the ice maker in the refrigerator.  I knew where the shutoff valves were to the basement shower, the washer, the hot water heater and the central air humidifier.  I know where the shutoffs are to the outside faucets and I know where the main shutoff valve is to the service to the house.  So I went down into the basement and looked again at the place where the pipes split off to the second floor and sure enough, there was a set of shutoff valves there too.  But they were frozen tight.  I reckoned they’d likely never been turned since they were first installed.

So that wasn’t helping.  I dosed them with WD40, figuring I’d work on unfreezing them a little bit at a time.  Then I went back to my shower repair manuals.  I found  a schematic of my Moen shower faucet and tried to figure out how to disassemble it.  Turns out the knob had a cap I could pry off.  I’d checked it for that when it first froze up but didn’t see any obvious one.  But seeing it there in the schematic it was obvious how to get the knob off and I grabbed a couple of small screw drivers and went to work.  With the cap popped off, I saw the phillips head screw attaching the knob to the mechanism and quickly unscrewed the knob and removed it.

The plastic knob was broken.  That was the problem.  The faucet mechanism it was attached to was fine.  I couldn’t turn it because a piece of plastic inside the knob had broken off, essentally disconnecting it from the mechanism.  Sweet.  I took the knob down to Home Depot and found a replacement for a few bucks.  With the new knob on the faucet worked again and the shower was back in service.  So in the end, all I had to do was replace the damn plastic knob. 

Moral of the story…don’t call the plumber until you’ve made sure it’s not a simple fix. I could have ended up paying for a whole new faucet I didn’t need.

I still need to get those shut off valves to the upstairs bathroom unfrozen though…