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Old 06-04-2020, 08:53 PM
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Yadkin Yadkin is offline
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I found this diagram. Looks like there is supposed to be only one switch.

The object at the top of the drawing, just left of center, looks to be a simple junction "tree". If that is true then it can be cleaned and tested for leaks, and if broken, replaced with one pass-through and two tees. If there are check valves integral and they are not working, they can be replaced with remote ones.

Once you locate that tree, it should be a simple process to test hoses for leaks and operators for function using a simple hand held vacuum pump.

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