Welding the tank is really quite easy, presuming the material is white, semi -
translucent plastic, meaning that it is made of Low Density Polyethelene
(LDPE). I tried the heat-blowing plastic welding kit from Harbor Freight, and
in retrospect would use the one without the fan which looks more like a stick
soldering iron with a paddle or disk tip. The key is to get LDPE stock from
Amazon or somewhere else, and get more than you think you will need. High
Density Polyethelene (HDPE) can be found all around your house in the form of
bleach bottles, etc., but HDPE will not stick to LDPE, so don't even bother
thinking that all polyethelene is the same.There are a lot of videos out there
on welding plastic tanks, because farmers, landscaping firms, etc. use the same
material for tanks you see on the back of trucks and tractors. Finally, if
you're concerned about the crack returning, you can even weld in a layer of
stainless steel mesh for reinforcement. We did this on Astralis. It gave me
peace of mind that I won't have to do the repair again.Finally, for those of
you who have issues with the cap/inspection port gasket leaking, go to
McMaster-Carr and get X orings. The X configuration makes the caps seal
properly, and then you can fill the tanks all the way up without worrying about
them leaking into the bilge.Hope this helps,Bruce Whitmore1994 C&C
37/40+"Astralis"Madeira Beach, FLSent from Samsung tablet.
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