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This is a new problem because this summer it was determined that John Guest, which is the company that produces the bulkhead fittings that are used at the plants, makes a bulkhead fitting that is made out of non-reactive polypropylene and not the potentially reactive acetal copolymer fittings that were previously used.
Unfortunately even though these fittings look the same, they are assembled differently than the acetal fittings. As can be seen in the picture bellow the old acetal fittings consisted of one solid main body. But the new polypropylene fittings consist of a two piece body. We currently submerge one side of the fitting in water, and intern water has been flowing between the body pieces which is not sealed or reinforced with an o-ring.
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