BurbMan wrote:
Threaded connections on the pump are standard 1/2" IPS. Go to the home center and get a standard flexible faucet supply hose with 1/2" on each end and connect it between the pump and the output line (leave the input side alone). The hose will have a female fitting on both ends, so it will connect directly to the pump. Use a short brass nipple to connect the female on the new hose to the female on the output line. No tape or pipe dope necessary as these fittings have internal washers that seal against the edge of the fitting. Hand tight only, do not overtighten.
Turn the pump on and watch the hose vibrate like crazy! You are isolating the vibrations of the pump from the hard plastic PEX plumbing in the TT. This simple mod costs about $10 and will eliminate 90+% of your pump noise. Do this before you spend $$$ on a new pump.
I also added a 2 gallon accumulator tank because I had room under the sink by the pump. This means that you can flush in the middle of the night without the pump turning on, a big plus since yours is under the bed.
Thanks. And you know, now that you mention it, I think I did the flexible hose thing! (It was over 10 years ago so I forget.) When things cool off here in Phoenix, I'll hafta dig into the front compartment and see exactly what I did do back then!