Winter Pool Plug with Blow Thru Valve for 1-1/2 Inch Pipe - # 8 filter-width_13 inches So testing for hydrogen peroxide

So testing for hydrogen peroxide would be an important test for individuals using this method for sanitizing their pools or spas

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generating a strong centrifugal effect

It is light enough to easily place on the bottom of the pool

The kit includes the three treads

Winter Pool Plug with Blow Thru Valve for 1-1/2 Inch Pipe - # 8 filter-width_13 inches So testing for hydrogen peroxideThis number 8 pool plug with valve creates a tight seal for a 1 1 2 inch PVC pipe. Includes a blow through valve for inserting compressed air into lines. Open stem plugs (or plugs with blow thru valves) use the same rubber, large wing nuts and corrosion free materials as closed plugs except they have an opening that passes through the center of the stem. They are similar to bike tire valves. This opening allows introduction of air or water pressure