I saved some bucks today. I was rinsing the pool Hayward cartridge filter, and when I went to re-install the filter into the housing, I saw that the thumbscrew for the filter vent was broken-off, flush with the housing. The filter vent screw/thumbwheel is made of plastic and the filter housing is fiberglass. That shouldn't be too-difficult to fix, eh? It may be if you're looking for the proper plumbing hardware on Sunday.
What the thumbwheel pressure vent looked like before it broke-off (the little knob on the left):
I tackled the removal of the plastic screw first. It got drilled-out and I used a Cornwell screw extractor to pull it out. The remaining thread was in need of being drilled to a 1/4" NPT size to fit the pieces I was going to use, not yet bought.
I went to Ace Hardware and bought a 1/4" X 1/4" MIP hex ****** fitting and a 1/4" FIP SS ball valve w/a brass body.
The MIP hex ****** got teflon tape on both ends, and after I used my 44+ year-old Craftsman Kromedge tap & die set (bought new) to tap a FIP thread in the drilled-out filter body, in the ****** went.
Teflon tape, the 1/4" FIP tap and the socket I used to hold the tap:
Then the 1/4" FIP 1/4 turn SS ball valve/brass body was threaded-on. The top-half of the pool filter housing was cleared of any plastic debris from the drilling, and a
schmear of plumber's grease was placed on the O-ring of the filter housing. Back together the filter housing went, and after cracking the ball valve open, the pool pump was turned-on.
When the ball valve started shooting water past me, I shut it off, and looked for any leakage. None was evident. I left the pool pump working, and checked on it occasionally until dusk. It was holding pressure, so it's good to go.
I checked Amazon Prime for prices on the Hayward filter top-half fiberglass housing, $327, w/tax. A new housing, complete, was ~$1100! The two 1/4" brass pieces were <$17. Looks like a savings of $310, if I had to buy the top-half of the filter housing, because I buggered the pressure relief hole trying to remove the broken-off plastic thumbscrew.