Out of stock
Product Note: The LX pump is the same as the Waterway Executive 56 5Hp pump, but the wet end on the LX pump is a little smaller in diameter. The LX pump discharge threads are about 3/4" lower, and the intake threads are about 1/2" lower, measured vertically from the bottom. Some minor adjustments in plumbing may be required. The LX WUA500B-II is also a suitable replacement for the Wateraway 3721621-13
*If your LX pump was manufactured before 2015, it will have metric threads. However, LX wet ends and pumps produced from 2015 onwards use North American standard threads, which are incompatible with metric threads. As a result, you'll need to replace the unions in your spa plumbing with ones that have North American standard threads.
