Propane plumbing - adding cat heater
Will install Platinum Cat heater, trying to figure out what fittings I need. With trailer being in Mexico, it's easier to bring all the parts from the US or Canada.
3/8 OD copper pipe going from under-floor iron pipe to gas range and other appliances is a nominal 1/4 ID, right?
So here is how I see it - for above the floor section. Correct me if I'm wrong:
1) 1/4 ID copper pipe exits the floor inside and will have 1/4 compression x 1/2 FPT- with compression going onto the copper pipe.
2) 1/2 FPT of part #1 goes onto the 1/2 MIP of 1/2 MIP x 1/2 MIP stainless 24" gas appliance connector - with excess flow valve included, it works like a shut-off valve. I could've just run the 1/4" pipe all the way to heater, but this 24" connector will make routing easier, and it has a valve.
Corrosion Q:
On brass compression fittings Home Depot has a warning "not to use on stainless tubing". I know about corrosion of dissimilar metals - is this really a problem? This warning is on compression only. That gas appliance connector is stainless, with brass excess valve - and there is no warning. Also, black iron pipes below, exposed to elements, have brass Tees where 1/4 copper pipe is connected - and they didn't see it as a problem. So there is no problem with stainless connector?
3) 1/2 MIP end of the connector #2 goes into the FIP end of 1/2x3/8 FIP coupling.
3/8 FIP end (NOT flared) goes onto 3/8 male flared end of the heater. I couldn't find a coupling 1/2 FIP x 3/8 female flared - is this a problem?
Not being a gas fitter I could've missed something - maybe a lot. Any criticism is appreciated. In a small Mex town it's better to understand what needs to be done and how, even if you hire somebody.
3/8 OD copper pipe going from under-floor iron pipe to gas range and other appliances is a nominal 1/4 ID, right?
So here is how I see it - for above the floor section. Correct me if I'm wrong:
1) 1/4 ID copper pipe exits the floor inside and will have 1/4 compression x 1/2 FPT- with compression going onto the copper pipe.
2) 1/2 FPT of part #1 goes onto the 1/2 MIP of 1/2 MIP x 1/2 MIP stainless 24" gas appliance connector - with excess flow valve included, it works like a shut-off valve. I could've just run the 1/4" pipe all the way to heater, but this 24" connector will make routing easier, and it has a valve.
Corrosion Q:
On brass compression fittings Home Depot has a warning "not to use on stainless tubing". I know about corrosion of dissimilar metals - is this really a problem? This warning is on compression only. That gas appliance connector is stainless, with brass excess valve - and there is no warning. Also, black iron pipes below, exposed to elements, have brass Tees where 1/4 copper pipe is connected - and they didn't see it as a problem. So there is no problem with stainless connector?
3) 1/2 MIP end of the connector #2 goes into the FIP end of 1/2x3/8 FIP coupling.
3/8 FIP end (NOT flared) goes onto 3/8 male flared end of the heater. I couldn't find a coupling 1/2 FIP x 3/8 female flared - is this a problem?
Not being a gas fitter I could've missed something - maybe a lot. Any criticism is appreciated. In a small Mex town it's better to understand what needs to be done and how, even if you hire somebody.
