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: 7:00 am to 5:00 pm Phoenix Time
Saturday: 8:00 am to 2:00 pm
Sunday: Closed
- We do not ship on Saturday or Sunday.
- Orders totaling more than $300 will require signature confirmation upon delivery.
- We process and prepare orders for shipment within 1 business day. Please note that many other pool supply retailers require 3–5 days of handling time before shipping.
- Orders placed after 1:00 pm Phoenix Time may not be eligible for same-day shipment.
- Expedited shipping options are available at checkout.
Return Policy:
- Products that are received damaged will receive a refund in store credit.
- Most products are eligible for return within 30 days of receipt, except where noted below.
- To initiate a return, please complete an RMA form prior to sending your item back.
- Original shipping costs are non-refundable and will be deducted from the return credit.
- Items returned missing accessories or original packaging, or that are not in the same condition as received, may be subject to a restocking fee of up to 100% depending on the condition of the item upon return.
- Some returns will be charged an automatic 15% restocking fee.
- We are unable to issue refunds for items that have been damaged or rendered inoperable due to installer error.
- Please complete the return form to receive your RMA number and return shipping label.
- Chemical products are not eligible for return under any circumstances.
- The Pentair Colorsync 618031 is not eligible for return.
- Pool cleaners are not eligible for return.
- Opened seals and o-rings are not eligible for return.
- Capacitors are not eligible for return.
- Plastic popup tools are not eligible for return.
- Automation components and circuit boards are not eligible for return.
- If a light is returned due to a reported malfunction and is found to be fully operational upon testing, return shipping costs and a restocking fee will be deducted from the refund.
- Orders refused at the time of delivery will be subject to the original shipping costs being deducted from the refund.
Related Products
