Well, Beantaxi, we are the manufacturer of the square tank you describe. I appreciate your concern. Would have appreciated the opportunity to discuss this in person, as I had offered today to your contractor, who I talked to twice. I tried calling him yesterday, but only got the message after he had left for the day.
Here is the tale of woe:
We started out with two choices for liners when we started up manufacturing the square tank. We had used two basic PVC liner materials with excellent success for about 20 years. One was a reinforced PVC rated for 185F and the other was an unreinforced PVC that was rated for 180F continuous.
We had the opportunity to use EPDM and chose not to go that route given the issues we discussed on this forum, basically poor longevity and reports of EPDM degradation causing copper heat exchanger corrosion. As I had stated before, EPDM is a choice, just not ours given our past experience and the current experiences of users.
So, we went back to our suppliers and told them what we were doing and asked for suggestions for new liner material that would be the same or better than what we were using. Both replied with the materials we had used previously and one suggested an improved version of the reinforced material that had quite a pedigree in terms of strength and temperature ratings. It is quite pricey, but that is what we chose. That was your first liner. It is very strong, and as you probably can tell, is rugged as hell.
It also gets damaged in shipping since it is rather stiff.
We did not discover this issue until we received some samples from a fabricator we were trying out in California in December. They shipped us four liners. Three reinforced and one non-reinforced. The three reinforced had abrasion holes from rubbing in the shipping box, which was cardboard. The non-reinforced shipped beautifully and was set up in a tank in our shop until yesterday, when we emptied the tank for testing other liners.
When we realized the liners had a shipping issue, we stopped shipping them even though we had shipped some wrapped in foam and ordered the other candidate material, which we had used. That was in December. We asked Bioheat to pull all liners in stock and canvas all dealers who still had uninstalled liners, instituting a recall of all of them.
I should note here that any liner that was picked up at our facility, did not have the shipping damage since it usually was in the backseat of a car or truck and worked fine. And liners that shipped earlier in the season, were not subject to this failure.
This issue has been contained to a few liner customers. There has been a wait for the new material, because as I stated here, this stuff is not off the shelf material. It is custom run for us.
So, the new liners were sourced to a custom fabricator who only works with PVC with specialized equipment. Those liners arrived last week and we shipped out your replacement along with a couple others. With all this going on, we had instituted an in-house testing procedure so we can test any liners quickly and find any leaks.
We did not test these new liners since we were assured that unpacking them (which is simple, repacking them neatly is a pain) was un-necessary.
Yours was not tested. And it had a flaw in the bottom corner weld.
How to I know that? Because we had one here in Maine! And we traveled 150 miles to replace it and then took that liner to the fabricator today.
I had found the welding flaw and they were dumbfounded. And I explained that we have to pay warranty labor to the installer, deal with an incredulous customer (who has had two stupid failures in a row!) and replace these until they work.
They are replacing those liners. We have tested all other liners in house and they were fine with one exception, another welding flaw, which also went back to the fabricator for them to see. We might ship your replacement tomorrow.
I say might, because I need to go and double check them in our shop tank (we got back late tonight). I want to be sure of the fit and that there are no other issues with the liners.
The one we replaced today is fine. The boiler was functional and they put heat into the tank.
I am sorry for this long saga, but it has been daunting to diagnose this, since we any of the original liners were tested in-house before they shipped and were fine. And when they got to the job-site, they leaked! In hindsight, it is a simple diagnosis, in real life, it was a stumper for bit.
We stand behind the product. It has been outrageously expensive to pull the inventoried materials. Thank goodness we have been able to contain the problem. We know that PVC liners work since we had used them for over 20 years with a handful of failures. We have seen more failures in the past month than we had in all those years. Not a lot, but enough to be unnerving.
So, we are going to pay for all this installation labor, even though there is none offered in the written warranty. We are replacing liners that have been an issue. And we have pulled everything that was not installed and are replacing them.
We will be doubling the liner warranty, which I had reported to your installer this morning. He said you were upset, and I passed along my cell phone number and would be happy to discuss any concerns you have. Sometimes these things get confused when going through several persons.
If you want to holler at us, you certainly can do it here or on the phone.
If you prefer, we will ship you EPDM, although I would advise against it.
I think I have been even handed in my explanations of these materials. They all have limitations. We stand behind PVC and readily admit our mistake.
IF a liner every leaks after our due diligence, we will repair or replace it.
I stand behind the product. It would've been a lot simpler to throw EPDM at the problem and walk away from it. I cannot do that in good conscience and BioHeat does not want us to do that either. They have been supportive and as frustrated as you and I have been. They are a great company to work.
Hope this helps.
Tom