Sand blasting is not the answer to a good prep for a replaster job
The time it takes for a heat pump to heat a spa depends on several factors, including the spa's size, the starting water temperature, the desired temperature, and the heat pump's capacity. Typically, a heat pump can raise the temperature of a spa by about 1 to 3 degrees Fahrenheit per hour. Therefore, heating a spa from a cool temperature to a comfortable level can take anywhere from several hours to a full day, depending on these variables. Proper insulation and covering the spa can help speed up the heating process.
no but when the jets are the spa warms up faster It doesn't actually heat up faster with them on. The jets help circulate the water so that the temperature of the water throughout the spa will more quickly be even. If your spa is properly designed the jets shouldn't matter at all, in fact, since jets use outside air to cause the bubbles if the outside air is colder than what you heat it too (100+ degrees) then the jets will actually cool the spa down more quickly.
There should be valves to redirect the water to and from the spa. Ken
I would go with no less than a 250,000btu. Reason being is the smaller you get the more time it takes to heat the spa thus using more gas. I prefer a 330,000btu. It will heat the spa in 50f water to 100f in approximately 30-40mins.
How do yo resurface or replaster and old pool
Go to one island, then surf upwards till you reach land. Walk upwards, soon you will encounter a small cave, go inside, that's the ember spa!
The carbon footprint would be very high. Think of all water a salon or spa uses just for sanitary purposes. Then there's energy. Energy for spa purposes, lights, and heat. In order to keep a spa clean, they use an excessive amount of water.
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When was the replaster job done? Were there leaks before the "first" plaster job? Were those leaks determined to be in the walls of the pool or in the plumbing? To answer your question - most likely - yes. Hmm, what do you mean by several? Ken