SBC wrote:
If the tank is about 20 years old, I suggest you change it. This is a waist
tank, you do not want it to leak! Listed below is a list of links you should
checkout and read the FAQ and technical info.

Not necessarily...the older tanks are often a lot more durable than
anything made today...many were made of extra thick-walled cross-linked
poly, whereas most water and waste tanks today are made of relatively
thin--1/4" or even less--low density linear poly. In fact, the holding
tank was the only part of the sanitation system I didn't replace on my
own 20 yr old "project boat"...it was so thick I suspect it would only
bounce if dropped off a cliff. That tank will last at least as long as
the hull, if not even longer.

--
Peggie
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Peggie Hall
Specializing in marine sanitation since 1987
Author "Get Rid of Boat Odors - A Guide To Marine Sanitation Systems and
Other Sources of Aggravation and Odor"
http://69.20.93.241/store/customer/p...40&cat=&page=1