CMP 1.5" & 2" CHECK VALVE FLAPPER & COVER W/ ORING 25830-704-800
CMP
SKU: 25830-704-800
CMP 25830-704-800 HydroSeal 1.5" & 2" Check Valve Flapper & Cover with O-Ring
The CMP 25830-704-800 HydroSeal Check Valve Flapper & Cover with O-Ring is a genuine replacement assembly for compatible CMP standard serviceable check valves. This part is designed for 1.5" and 2" check valve applications and helps restore proper one-way flow control in pool and spa plumbing systems.
This replacement assembly is commonly used when the original flapper is worn, cracked, leaking, stuck, or no longer sealing properly. A properly working check valve helps prevent water from flowing backward through the plumbing, which can help protect equipment and maintain proper pool or spa circulation.
Product Features
- Genuine CMP HydroSeal replacement part
- Manufacturer part number: 25830-704-800
- Replacement flapper and cover assembly
- Includes cover O-ring
- Fits compatible 1.5" and 2" CMP standard serviceable check valves
- Helps restore proper check valve sealing and flow direction
- Ideal for repairing a leaking, worn, or damaged check valve assembly
- Used in pool and spa plumbing applications
Product Details
| Brand | CMP / Custom Molded Products |
| Part Number | 25830-704-800 |
| Product Line | HydroSeal |
| Product Type | Check Valve Flapper & Cover with O-Ring |
| Valve Size | 1.5" and 2" |
| Application | Pool and spa check valve repair |
Compatibility
- CMP standard serviceable check valves
- Compatible 1.5" check valve applications
- Compatible 2" check valve applications
- Pool and spa plumbing systems using the matching CMP check valve body
Common Uses
- Replacing a worn or damaged check valve flapper
- Repairing a leaking check valve cover
- Restoring one-way flow through pool or spa plumbing
- Helping prevent water from draining backward through the system
- Servicing check valves used near pumps, heaters, sanitizers, spas, and water features
Important Notes
- This item is the flapper, cover, and O-ring assembly only.
- The complete check valve body is sold separately unless otherwise stated.
- Verify your existing check valve model and size before ordering.
- This part is intended for compatible CMP 1.5" and 2" standard serviceable check valves.
- If the check valve body is cracked or damaged, the complete valve may need to be replaced.
Installation Notes
- Turn off the pool pump before servicing the check valve.
- Relieve system pressure before removing the valve cover.
- Remove debris from the valve body before installing the new flapper assembly.
- Inspect the sealing surface for cracks, scale, or damage.
- Use only pool-safe silicone lubricant on the O-ring when needed.
- Tighten the cover evenly to help prevent leaks.
- Restart the system and check carefully for proper operation and leaks.
Maintenance Tips
- Inspect check valves periodically for leaks, sticking, or noisy operation.
- Keep debris out of the plumbing system to help prevent flapper damage.
- Replace worn O-rings if the valve begins leaking around the cover.
- Maintain proper water chemistry to help reduce scale buildup inside the valve.
- Service check valves promptly if spa water drains back into the pool or equipment loses prime.
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