Not sure...but new ones can be found at:
Inca Plastics
Looks like you have the model numbers already from the old ones - if not exact matches at least a start - they ought to be able to look them up. Don't know what your welder is going to charge...but you might want to just get new ones that'll last another 30 years. Also, you could call Inca,
Tel # (909)923-3235 and ask them the material if you are determined to weld them.
From their website:
Quote:
| All of our tanks are molded in one piece out of a tough polymer resin. |
Shari
