Hayward VL40T32 Sand Filter Stand Pipe & Underdrain Assembly | VLX4001A
Hayward Products
SKU: VLX4001A
Hayward VLX4001A Stand Pipe & Underdrain Assembly (VL Series Sand Filters)
Hayward VLX4001A is a genuine replacement stand pipe and underdrain assembly for select Hayward VL Series sand filters (commonly referenced for the VL40T32). This internal assembly helps route water through the filter bed and collect filtered water for return to the pool. Replace it if the original underdrain/standpipe is cracked, broken, or allowing sand to pass into the pool.
Key Features
- Part Number: VLX4001A
- Brand: Hayward
- Type: Sand filter internal stand pipe & underdrain assembly
- Designed for compatible Hayward VL Series sand filters (verify model fit before ordering)
- Helps support proper filtration flow path and filtered-water collection
- Genuine replacement part for proper fit and reliability
Common Symptoms This Part Can Help Fix
- Sand returning to the pool through the returns
- Reduced filtration performance due to damaged internal collection components
- Cracked or broken stand pipe/underdrain discovered during sand change
- Internal leakage or poor sealing at the standpipe connection (model-dependent)
Installation Notes
- Confirm your exact filter model and internal configuration before ordering (commonly used on VL40T32).
- Shut off pump power and relieve filter pressure completely before opening the filter.
- Best replaced during a sand change or when the filter is emptied for service.
- Inspect the tank for cracks and check for worn O-rings/clamps while the filter is open.
- Refill with the correct sand type and amount for your filter model after installation.
Related Products
- Hayward VLX4001A
- Hayward VL Series Sand Filter Parts
- Hayward VLX4002A Clamp Hardware & Tank O-Ring Kit
- Pool Filter Sand
- Pool-Safe O-Ring Lubricant
- Hayward Sand Filter Valve Parts
Maintenance Tips
- If you see sand in the pool, inspect the underdrain assembly and laterals (if applicable) during service.
- Backwash as needed and avoid over-backwashing, which can reduce filtration quality.
- During sand changes, inspect internal parts for cracks or brittleness and replace as needed.
- Keep the valve clamp and tank O-ring clean and properly seated to prevent leaks after reassembly.
Questions about returns? View our return policy.
Hours Of Operation:
Monday - Friday: 8:00 am to 4:00 pm Phoenix Time
Saturday and Sunday: Closed
- Orders costing more than $300 WILL be required to have signature confirmation upon delivery.
- Handling time is typically only 1 day.
- Any item ordered after 1pm Phoenix time, may not ship same-day.
- Call us if you require expedited shipping and we can give you quotes based on your needs.
Return Policy:
- All products, except as noted below, are eligible for return up to 30 days after receipt of item.
- For returns, an RMA form must be filled out HERE or customers can call for additional help.
- Shipping costs will be deducted from all returned items.
- Any item that is missing accessories, original packaging, or is not returned in the same condition that it was received in, may be subject to a re-stocking fee up to 100% based on the condition we receive it in.
- Items broken, damaged, or inoperable due to installer error will not be refunded.
- Fill out the return form or give us a call to obtain an RMA and return shipping label.
- There are no returns on the Pentair Colorsync 618031
- No returns on pool cleaners.
- No returns on opened seals and o-rings.
- No returns on capacitors.
- If a light is returned because it "doesn't work" and it tests fine, the cost to ship and a re-stocking fee will be deducted from the refund.
- All products denied upon arrival at customers house WILL be charged the cost to ship.
- Visa Gift Card Promotions: Gift cards are sent within 14 days of the order. When accepting the Visa Gift card, you agree that if your order is returned or refunded, this amount will be deducted from the refunded amount. All Visa Gift cards are sent via email in an E-Gift Card format and are non refundable.
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