| Author |
Message |
Pat (Proudeagle10)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, January 02, 2006 - 11:25 pm: | |
Is there an alternative for spin weld on plastic tanks? Like "fittings" for the black water inlet and outlet. And if there is, could someone give me a web site or phone number. I would certainly appreciate it.
Thanks in advance. Pat |
Ed Jewett (Kristinsgrandpa)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, January 02, 2006 - 11:53 pm: | |
Hot air/plastic welders. I bought all of my fittings from Roational Moldings in FL.
The biggest problem I had was finding polyethylene welding rods for my tanks, I finally made some. The rods have to be the same material as the tanks. J.C. Whitney has rods but shipping is high. Harbor Freight has rods but don't carry polyethylene.
Check Gumpydogs website he has a lot of info and pics. of his tanks he made himself.
If you consider doing your own fittings, Gumpydogs website is a must.
HTH ED |
John MC9
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, January 03, 2006 - 12:08 am: | |
Pat -
Yeah, there's fittings available that work nicely. Here's one
location to get what you need:
RV Surplus • P.O. Box 4516 • 1400 West Bristol Street • Elkhart, IN 46514
There's also compression fittings that require no heat or chemicals
to install. |
Jerry Liebler (Jerry_liebler)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, January 03, 2006 - 6:50 am: | |
Pat,
It's vital that fhe fittings be of the same material if they are to be welded into the tanks.
The most suitable material is polypropylene but high density polyethylene, low density polyethylene and ABS have all been used. ABS can be solvent welded but all can be hot air welded. See http://www.gumpydog.com/bus/MC9_WIP/Plumbing/Holding_Tank_Fabrication/holding_tank_fabrica tion.htm
for an excellent way to make your own. I have 4 tanks made this way, ranging from 4 gallons (my Webasto resevouir) to 220 gallons (my black/grey tank), the first took over a week, the last about 2 days. If you go with polypropylene I have about 5 pounds of leftover welding rod.
Regards
Jerry 4107 1120 |
Chuck Newman (Chuck_newman)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, January 03, 2006 - 10:44 am: | |
Jerry,
Most of the water tanks I have seen commercially are made of polyethylene. Is polypropylene basically the same material as polyethylene? Does one have an advantage over the other?
Also, I recently purchased a ten gallon polyethylene water tank with fittings placed with what appears to be heavy white glue, solid to the touch. Is this what hot air welding looks like when cool?
Thanks,
Chuck Newman
Oroville, CA |
Dale Fleener (Dale_mc8)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, January 03, 2006 - 11:53 am: | |
To be sure that the rods you use are the same material as the tanks, cut up the pieces that result from cutting the holes the fittings will go into and use that for rods.
FWIW
DaleMC8 |
Jerry Liebler (Jerry_liebler)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, January 03, 2006 - 6:04 pm: | |
Chuck,
Polypropylene has a bit better impact resistance otherwise the differences are slight between it and high density polyethylene which is slightly lower cost. It's possible you are looking at a weld made with rod that had different color than the tank itself. To my knowledge there is no glue that'll work on polyethylene. In hot air plastic welding the materials to be joined and the rod are all heated till they soften and then the rod is pushed into the joint, in other words a filler rod is always used.
Regards
Jerry 4107 1120 |