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I would like to get some input as to an issue that occured with a neighbor's pool. The pool is standard freshwater with a DE filter, raised wall with flagstone in rear and flagstone around waterline. They contracted a reputable company to remove the calcium buildup on the stone and to acid wash...

We had a contractor resurface a pool with standard white plaster about a month ago. He does about 20-25 of these per year for us. We went through the normal routine of brushing and balancing chems during the first week and turned it over to the customer with the typical instructions; no...

I am working on a Laars LD400NL heater, low nox version with fan, of which there are very few out in the field. The problem is the heater will fire every time but shuts off after 2-3 seconds. I suspect the flame sensor, but not even Zodiac has the correct part number. They show the R0334300...