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Post by wisconsinjoe on Sept 12, 2013 7:23:45 GMT -8
I am confused about what kind of fittings I should use to customize a blank (no holes) rectangular box, 12 gallon polyethylene water tank. I will install a 4" access lid (screw on and off) to manually fill the tank under the dinette seat. I need to accurately locate the drain and outlet to my plumbing line. I have a 3/8" OD copper line that runs to my sink with a rocket siphon pump. I may choose to replace the copper with PEX. The access lid can be loosened on site to provide make up air in the tank. Should I be using "thru hull" fittings? I see them in plastic and stainless steel in many sizes, but most come with a screw threaded shaft with nut followed by a hose barb. To make them waterproof, should a sealant caulk be used, an O-ring, or both? How to make the connection to the water line?
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Post by vikx on Sept 12, 2013 21:18:55 GMT -8
Poly tanks normally have heat spun fittings installed by the seller. The fill has a rubber gasket; it is push in. (not used in your case) Most poly tanks have 1/2" threaded outlets at different corners, molded in. The spun fittings are added if needed. I've not seen bulkhead fittings used.
You might consider adapting the trailer to the tank rather than worrying about duplicating the exact drain location. Another hole in the floor but you can plug the first one...Ell off a corner and down.
Hope this helps.
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cowcharge
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Post by cowcharge on Sept 13, 2013 5:20:37 GMT -8
All the fittings on my tank are the same green/blue plastic as the tank, and use half-inch pipe thread, which is the same as all the fittings on the plastic plumbing lines (dunno if my lines are real PEX or not, they're black plastic with white ball fittings on the ends).
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mobiltec
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Post by mobiltec on Sept 18, 2013 21:02:16 GMT -8
When you only have a 12 gallon tank I recommend that you use a hand pump and plastic tubing. It's easy and you won't waste as much water because you have to hand pump it. You will be very surprised how fast 12 gallons will disappear when you have an electric pump. Just another possiblilty to consider.
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cowcharge
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Post by cowcharge on Sept 19, 2013 11:43:24 GMT -8
Heck, 12 gallons disappears fast enough just using jerry cans.
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Post by wisconsinjoe on Sept 20, 2013 9:56:53 GMT -8
When you only have a 12 gallon tank I recommend that you use a hand pump and plastic tubing. It's easy and you won't waste as much water because you have to hand pump it. You will be very surprised how fast 12 gallons will disappear when you have an electric pump. Just another possiblilty to consider. I do have a hand pump. Good advice. |
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