Pool Plumbing Supplies

(169 products)

Our high-quality pool plumbing supplies and parts will keep your pool's system operating smoothly. EZ Pools products are durable and efficient. You get secure, leak-free connections with our pool plumbing fittings. Our supplies are reliable and easy to use as replacements or for new installations. Explore our extensive selection for all your plumbing needs. You also may be interested in our pool heaters.

Quick Links
Ball Valves Ball Valves Check Valves Check Valves Diverter Valves Diverter Valves Unions and Fittings Unions and Fittings Pool Flow Meters Pool Flow Meters
View as

Understanding Your Pool Plumbing System

Your pool's plumbing system is the backbone of everything — it moves water from the pool to your equipment and back, controls flow direction, and allows you to isolate components for service or winterization. The main categories of pool plumbing components are valves, fittings, and unions. Each plays a specific role, and knowing what you have and what you need makes repairs and upgrades significantly easier.

Valves are the most commonly replaced plumbing components in any pool system. Ball valves provide simple on/off flow control for equipment lines. Diverter valves split or redirect flow between two or more lines. Check valves prevent backflow, protecting equipment from reverse pressure. Filter valves (also called multiport valves) direct water through the different operating modes of a sand or DE filter. Most residential pool plumbing runs on 1.5 inch or 2 inch PVC, and the majority of valves and fittings are available in both sizes.

Fittings and unions round out the system. Unions allow equipment and valves to be disconnected and removed without cutting pipe, which is critical for servicing pumps, heaters, and filters. Couplings, elbows, and tees handle the structural connections throughout the plumbing run. Flow meters help you monitor and balance circulation across multiple returns or features.

Buying the Right Pool Plumbing Parts

Before ordering any plumbing component, confirm your pipe size and connection type. Most residential pools use 1.5 inch or 2 inch PVC, but some older systems or commercial installations may differ. Check the markings on your existing pipe or valves if you are unsure. Buying the wrong size means additional adapters or, in some cases, replumbing the connection entirely.

For valve replacements, note whether your existing valve is glued in or uses union connections. Union-style valves and fittings are worth the extra cost on any equipment connection since they allow removal without cutting pipe. If you are replacing a valve that was glued in, consider upgrading to a union configuration while you have the line open. For parts like stems, handles, and union nuts, matching the brand and model of your existing valve is the most reliable way to ensure compatibility. EZ Pools carries replacement parts and full valves from Pentair, Hayward, and Jandy to cover the most common residential pool plumbing configurations.

Jandy 4715 Never Lube 3-Port Diverter Valve

Frequently Asked Questions

What size pipe does most residential pool plumbing use?
Most residential pools use 1.5 inch or 2 inch PVC pipe. Check the markings on your existing pipe or valves to confirm before ordering fittings or replacement valves. Some older systems and commercial installations may use different sizes.
What is the difference between a union and a standard fitting?
A standard fitting glues directly into the plumbing and cannot be removed without cutting the pipe. A union fitting has a threaded nut that allows the connection to be broken and reassembled without cutting, making it far easier to remove and reinstall equipment. Unions are recommended on any equipment connection where future service is expected.
What types of pool valves are there?
The most common pool valve types are ball valves, diverter valves, check valves, and filter multiport valves. Ball valves provide on/off flow control. Diverter valves split or redirect flow between lines. Check valves prevent backflow. Filter valves control the operating mode of a sand or DE filter.
How do I know which replacement valve or part to order?
For a full valve replacement, you need to know your pipe size and whether you want a glue-in or union-style valve. For individual parts like stems, handles, or union nuts, match the brand and model number of your existing valve. The model number is usually molded into the valve body.
Can I use standard PVC fittings and valves with a saltwater pool?
Yes. Standard PVC and schedule 80 PVC are both resistant to saltwater and chlorinated water. Most quality pool valves and fittings are rated for continuous chemical exposure. If you are unsure, check the product specifications or contact EZ Pools before ordering.

Related Articles

View all
  • Choosing the Right Pool Heater: A BTU Sizing Guide
    Choosing the Right Pool Heater: A BTU Sizing Guide

    Choosing the right pool heater isn't as simple as picking the biggest one you can afford. Get undersized and your heater runs constantly, struggles to hold temperature, and burns through...

    EZ Pools |

  • pool clarifiers vs pool flocculants
    Pool Flocculant vs. Pool Clarifier

    In maintaining a sparkling clear swimming pool, understanding the differences between flocculants and clarifiers is crucial. Many pool owners often grapple with choosing the right chemical to tackle murky water,...

    EZ Pools |

Shop Pool Plumbing

Shop our selection of pool plumbing supplies and find everything you need to maintain, repair, or upgrade your pool's plumbing system. EZ Pools carries valves, fittings, unions, flow meters, and replacement parts from trusted brands with free shipping on qualifying orders.

Shop Now
Back to top