Acid injector for pool - help needed
I have a new plaster pool and they use lots of acid for the first year
or so. I've plumbed a line from the inlet side of my pump to a tank with 3 parts water, 1 part acid. I'm using irrigation drippers in line to regulate the flow and have it just right so it keeps the pool pH level correct. I know of other people who have done this and it works long term. My problem is that when the pump shuts off, a small amount of the acid still siphons into the pool plumbing. Maybe because the tank is slightly higher than the pool level? Its about a quart over night. I was thinking maybe a small spring loaded check valve would help, where just the spring pressure would be enough to stop the siphon flow, but when the pump is on and creates a vacuum, it would be enough to move the spring. Any ideas? |
Acid injector for pool - help needed
On Oct 14, 9:29*am, wrote:
I have a new plaster pool and they use lots of acid for the first year or so. *I've plumbed a line from the inlet side of my pump to a tank with 3 parts water, 1 part acid. *I'm using *irrigation drippers in line to regulate the flow and have it just right so it keeps the pool pH level correct. *I know of other people who have done this and it works long term. My problem is that when the pump shuts off, a small amount of the acid still siphons into the pool plumbing. *Maybe because the tank is slightly higher than the pool level? *Its about a quart over night. I was thinking maybe a small spring loaded check valve would help, where just the spring pressure would be enough to stop the siphon flow, but when the pump is on and creates a vacuum, it would be enough to move the spring. *Any ideas? I've seen small check valves for fuel systems and they run pretty low pressure so the spring can't be all that big. But it will be an experiment to see if the pump vacuum is enough to overcome any spring. Got a vacuum meter you can put on the inlet? That would at least tell you the draw. |
Acid injector for pool - help needed
On Oct 14, 9:41*am, jamesgangnc wrote:
On Oct 14, 9:29*am, wrote: I have a new plaster pool and they use lots of acid for the first year or so. *I've plumbed a line from the inlet side of my pump to a tank with 3 parts water, 1 part acid. *I'm using *irrigation drippers in line to regulate the flow and have it just right so it keeps the pool pH level correct. *I know of other people who have done this and it works long term. My problem is that when the pump shuts off, a small amount of the acid still siphons into the pool plumbing. *Maybe because the tank is slightly higher than the pool level? *Its about a quart over night. I was thinking maybe a small spring loaded check valve would help, where just the spring pressure would be enough to stop the siphon flow, but when the pump is on and creates a vacuum, it would be enough to move the spring. *Any ideas? I've seen small check valves for fuel systems and they run pretty low pressure so the spring can't be all that big. *But it will be an experiment to see if the pump vacuum is enough to overcome any spring. *Got a vacuum meter you can put on the inlet? *That would at least tell you the draw. There are systems available to inject chlorine for pools that work in the way you want. I'd find some of those online, check out how they are made, etc. You may get an idea or find a replacement part for one that you could buy and use. Those parts are at least chlorine resistant, so likely they would stand up to acid too. But you definitely need something because you don't want the concentrated acid going into the pool pump and other system components. |
Acid injector for pool - help needed
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