Well, I'm about halfway there. With the help of a Dremel to cut off the PEX crimp on the tank drain, I finally got both the tank and system drains removed.
I was able to repair the old tank drain by tightening the packing nut. This is a picture of the ready to reinstall tank drain assembly with teflon tape on the tank fitting threads.
I bought what I thought was the most appropriate system drain (Flair-it 180 Degree Center Drain Valve 06914) from RVplus.com.
Based on responses to this topic posting, I was going to use PEX tubing into the valve's Flare-it connectors, but I am concerned about RV and water pump vibrations causing leaks. Also the acute connection angles are probably not achievable with rigid PEX tubing. Here is a photo of the old push-pull drain valve after it was removed: (note the hose-type connector for the water pump)
Is there a flexible type of tubing that will work with the Flare-it connectors? The only 1/2" i.d. flexible tubing I could find at the local hardware stores has an outside diameter too large for the compression collar.
Alternatively, should I add threaded connector adapters onto the water pump and system sides of the drain valve so that the drain is connected with flexible supply hose?
Since I do not have a PEX crimp connector tool, I am trying to use Flare-it connectors on the PEX, but is it possible to use screw-tightened hose clamps with PEX?
This seems to be getting overly complicated. It would be much simpler if I could find a flexible hose to fit in the Flare-it connectors.
Thanks for the help.
