i got a local goldenrod filter and fittings for that, but the filters are too expensive, so i got some cimtek filters and mount from jmesales.com. far less expensive. i have to go return the pluming i got from home depot, which was about $30 alone. with the cimtek the npt is smaller and i dont have reduce the pluming and all i need are the npt to barb fittings. about $5, ill probably go with pex if they have, i dont know that i trust pvc with that heat. i also hope i can find some cheap NAPA filters that will fit that mount too.Home Depot has those fittings, I found them in plastic for around $1 each. I needed 4 for the 2 filters I plumbed together.