Quote:
Originally Posted by Thane
1. Spin-weld a new fitting on the bottom of the tank to provide a proper low point drain. Unfortunately our local RV service center can’t do spin welding and the nearest other service centers were at least 60 miles away. I didn’t check to see if they could do spin welding. Plus I was a little concerned about adding a new fitting to the bottom of a 10 year old tank.
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That seems like a promising approach. Maybe someone else will try it.
I've never spin-welded anything, but my understanding is that the only special equipment that is required is a drive fitting; people do it at home (perhaps with a borrowed drive fitting, if they're only doing it a couple of times). It seems strange that the local RV service centre doesn't have experience with it - perhaps they're one of those places that just replaces parts and doesn't actually fix or modify anything.
I understand the concern about age, but LDPE is still a thermoplastic at any age - it will still melt.
Quote:
Originally Posted by Thane
3. Use an expandable rubber plug inserted into a hole drilled in the bottom of the tank. I thought this may make the water taste odd and the tank thickness (1/8th inch) may not be adequate to hold the plug without possibly cracking of the plastic.
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Aside from the rubber and thickness/stress issue, the plug would protrude into the interior and still leave an undrained dead space.