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Old 05-02-2019, 07:28 PM   #11
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The fresh tanks work fine for grey as well. All my tanks were used so nearly all the openings were in the wrong place.I was able to get spin weld fittings nearby so I set about rigging up my own spin tool--the router thingy. A word of caution. a router turns at about 25,000 rpm's and when the replacement plug or new fitting touch the tank, both touching surfaces become molten and until you get the hang of spin welding its easy to get a bath of blistering hot plastic--I sure did!

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This is my 40 gallon grey tank with various home done spin weld fittings.

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Jack
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Old 05-02-2019, 07:41 PM   #12
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Old 05-02-2019, 07:55 PM   #13
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Great video though I like most "real men" wouldn't have watched it had I even known about it.
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Old 05-06-2019, 11:02 AM   #14
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Spinweld is the way to go.

I have used lots of Uniseals and they are cool but I have had some issues with them leaking just a little bit and with larger (2"+) seals causing the tank to crack.
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Old 05-12-2019, 04:21 PM   #15
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This is great. I’ve been wondering about how to modify fittings on my tanks. Good to learn about uniseal and spin welding. I’ve been wondering about plastic welding. Has anyone tried it?? Last time I did anything remotely similar was dripping molten plastic on the scratches of my skis almost 40 years ago. Oh, and heating and bending plastic conduit.
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Old 05-13-2019, 07:50 AM   #16
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Quote:
Originally Posted by Doktari View Post
This is great. Iíve been wondering about how to modify fittings on my tanks. Good to learn about uniseal and spin welding. Iíve been wondering about plastic welding. Has anyone tried it?? Last time I did anything remotely similar was dripping molten plastic on the scratches of my skis almost 40 years ago. Oh, and heating and bending plastic conduit.
Plastic welding is kind of like soldering, and there is a ton of options for various kits. My experience is mostly with the airless systems. And I have found that the speed welding tip makes the smoothest and most consistent welds, at least for me anyways. They are fairly common amongst rednecks, as we don't like paying the price for new plastics...and we tend to beat them up on our sleds, quads, bikes, etc. If coupled with a decent heat gun your options for dealing with plastics are virtually limitless.

this one if similar to the one we have up here....however we did not pay that price......
https://www.amazon.ca/Urethane-Suppl...gateway&sr=8-5
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Old 05-13-2019, 10:43 AM   #17
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i used uniseal gadgets on mine. very tight and very good seals
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Old 05-14-2019, 08:31 AM   #18
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Another option is to put an oval hand hole in the top surface of the tank. That allows any regular flanged fitting to be installed.

The lid to close the hand hole is made from two pieces of PE marine lumber (like Starboard) that are clamped together with crews. The inner piece will fit through the oval hole when turned 90 degrees. The flanges are sealed with a bead of RTV that is cured with the lid only slightly tightened. Final tightening of the screws compresses the 'gasket' and seals the whole deal.
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