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The brand is widely used by homeowners and service professionals alike
It allows attachment to matching pipe fittings
Engineered by Custom Molded Products (CMP)
This focus on quality means fewer replacements and reliable operation in critical systems
It is often part of advanced heater diagnostics in IDL2 models
Hayward Standpipe and Underdrain Assembly | VLX4001A Fire Pit The brand is widely usedWhat This Part Is Used For The Hayward VLX4001A is a standpipe and underdrain assembly used inside compatible Hayward VL Series sand filters. It manages internal water distribution through the sand bed and supports proper filtration and backwashing. This assembly lives inside the filter tank under the multiport valve connection. Why This Part Matters If the internal underdrain components are cracked or out of position, the filter can bypass sand and
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