| Author |
Message |
C. Ray Powell (Raypowell) (152.163.195.192)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, May 01, 2002 - 7:16 am: | |
I have heard the phrase "spinning the tank fitting in". How is that done? Or is it ok to glue them in? Plastic tanks that is.
Thanks
C Ray |
Jim Ashworth (Jimnh) (172.133.144.21)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, May 01, 2002 - 8:40 am: | |
I've never done it but I have watched. They use a router with an adapter plate that fits the specific fitting to be spun in. The fitting is mounted to the plate and the router is turned on and the fitting positioned lightly onto the tank wall. Heat from the friction softens the plastic of both halves and the router is turned off and the fitting pressed to the tank while the router slows. The hole through the tank is then cut with a hole saw. Even with experience, not every joint is sufficiently melted to make a good weld so before the plastics totally cool, the fitting is pried off and they try again. Most tank vendors will spin fittings on for no extra charge.
Jim |
FAST FRED (63.215.237.160)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, May 01, 2002 - 8:50 am: | |
The folks that do this for a living have a 1hp router with a jig that holds the different sized fittings.
The fitting is simply placed on the holding fixture , held against the tank , in the location of a previously cut hole , and the trigger is pulled.15 seconds its done!
The fitting gets hot enough to actually MELT the tank and fitting surface.
When they stop spinning the fitting it hardens with the tank surface , creating a one piece instalation.
Really fast , you could do it easily at home if you had both the fitting AND a holder for the fitting in the router.
The folks in Lake Wales are GREAT about letting you watch , or they will work from any UNDERSTANDABLE drawing , need NOT be a blueprint , or work of art.
There are sooooo many plastics and soooo many glues that I would prefer to spin them in , even if I had to make the fitting holder for the router my self.
FAST FRED |
joe shelton (Littlewind) (67.241.228.222)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, May 15, 2002 - 12:12 am: | |
You might want to read the article G Lowry wrote. Go to
Look under articles and then the name George Lowry.
I wont bother with spinning them in when glue is much ezeer (I tink). |
Gary Stadler (Boogiethecat) (68.7.217.217)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, May 15, 2002 - 12:59 am: | |
Joe, The reason they spin fittings in is because there is NO glue that sticks to polyethylene, which is what most RV plastic tanks are made of. Spinning them melts the interface between the fitting and the tank, and creates a weld. There's no other way to do it reliably except a nut and gasket type of fitting. If the tank is PVC or ABS it can be glued but those aren't as widely used as polyethylene.
Cheers (and leaks)
Gary |