Preventing Backflow on Ariel Jetted Tub Install

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hj

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it is not only reasonable, but NECESSARY for ANY tub with submersible inlets. The 'minimum' protection would be check valves on the supply lines, if he would accept them., possibly with a rim mounted vacuum breaker on the supply line from the two handles to the jets. Otherwise you have to install backflow/vacuum breakers on both lines, but one would have to be suitable for hot water.
 
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