The best fiberglass pool return fitting depends on the wall opening and plumbing connection you need to match. The Custom Molded Products fitting is a direct option to compare for a fiberglass wall and 2-inch spigot; SP1023-style fittings are better suited to 1-1/2-inch FIP returns. The products below cover those connection types, plus a 1-1/2-inch slip fitting and a long-body alternative. Check the existing fitting’s thread, pipe size, body style, and sealing parts before ordering.
| Product | Best suited for | Connection detail |
|---|---|---|
| Custom Molded Products 25523-500-000 | Fiberglass walls | 2-inch spigot |
| ChangTa SP1023-style fitting | 1-1/2-inch FIP returns | Internal threads, locknut and gasket |
| LDZHD SP1023-style fitting | FIP replacement assemblies | 1-1/2-inch FIP, sealing components included |
| CMP slip wall fitting | Slip plumbing connections | 1-1/2-inch slip, gasket |
| Pentair long-body wall fitting | Long-body installations | 1-1/2-inch MPT x 1-1/2-inch FPT |
Custom Molded Products Fiberglass Wall Return
This white Custom Molded Products fitting is listed as a fiberglass pool wall return fitting with a nut. Its key connection detail is a 2-inch spigot. That specification makes it a candidate when the existing plumbing or pool-wall fitting calls for this spigot size.
Best for: Pool owners replacing a fiberglass-wall return fitting who need a 2-inch spigot and a nut-style assembly. It was selected because its listing specifically identifies fiberglass pool use and states the connection size.
Check before buying: The listing does not provide every installation dimension. Confirm the required spigot size and wall arrangement against the existing part rather than assuming that all fiberglass return fittings are interchangeable.
ChangTa SP1023 1-1/2-Inch FIP Return
This fitting is described as a 1-1/2-inch FIP inlet return fitting for Hayward SP1023 applications. FIP means the fitting has internal threads. The listing says the package includes a locknut and gasket and describes use with fiberglass pools and vinyl liners, as well as above-ground and inground pools.
Best for: Buyers matching a return that requires 1-1/2-inch FIP threads and a wall-mounted assembly. The listed accessory uses include plugs, outlet covers, directional fittings, grate inserts, and hydrotherapy fittings.
Check before buying: The product description refers to multiple sealing pieces in its explanation of inlet assemblies. Verify the actual included components and compare the thread size with the old fitting before installation.
LDZHD 1-1/2-Inch FIP Return Assembly
The LDZHD return fitting is listed for SP1023 and many 1-1/2-inch FIP return applications. Its stated assembly includes a flanged nut, two gaskets, a fiber washer, and the inlet body. The listing also names directional eyeball fittings, outlet covers, plugs, grate inserts, and hydrotherapy jets as compatible accessory types for most returns with the specified threads.
Best for: Replacing an FIP inlet assembly when the existing fitting uses 1-1/2-inch internal threads and the sealing pieces need replacement too. It was selected for its clearly listed assembly contents and range of return accessories.
Check before buying: “Fits most” does not mean it fits every pool return. Confirm the connection and wall thickness requirements for your installation.
CMP Fiberglass 1-1/2-Inch Slip Wall Fitting
This Custom Molded Products wall fitting is described as a fiberglass fitting with a gasket and a 1-1/2-inch slip connection. A slip connection differs from a threaded fitting: the listed connection type is the main detail to match with existing plumbing.
Best for: A replacement where the current wall fitting uses a 1-1/2-inch slip connection and a gasket. It adds an option for shoppers whose plumbing does not call for the FIP or spigot styles listed above.
Check before buying: The product details provided do not specify additional dimensions or included hardware beyond the gasket. Confirm the connection style and required parts for your pool before ordering.
Pentair Fiberglass Long-Body Wall Fitting
This white Pentair fitting is identified as a fiberglass long-body wall fitting with a 1-1/2-inch MPT by 1-1/2-inch FPT connection. MPT indicates male pipe threads, while FPT indicates female pipe threads. Those details make it distinct from the FIP-only assemblies and slip fitting in this list.
Best for: Buyers who need a long-body fitting and a matching male-to-female 1-1/2-inch threaded connection. It was selected to represent a threaded, long-body alternative.
Check before buying: The supplied product details do not state the fitting’s full dimensions. Confirm body length and thread orientation against the existing part.
Buying Guide: How To Choose A Fiberglass Pool Return Fitting
Which connection type do I need? Identify whether the plumbing uses a spigot, slip, or threaded connection. For threaded fittings, distinguish FIP or FPT internal threads from MPT external threads. A size such as 1-1/2 inches does not by itself identify the thread orientation or fitting style.
What should I measure? Compare the old fitting’s stated pipe size, wall-side body shape, thread type, and overall length. For a fitting that passes through a pool wall or liner, also check how it secures and which gaskets, washers, or nuts are required.
Do I need a complete assembly? Choose a listing that states whether it includes sealing hardware if you need to replace more than the fitting body. The ChangTa and LDZHD descriptions mention a locknut and sealing parts; the CMP slip listing specifically mentions a gasket. Confirm package contents where the description is unclear.
How do I avoid a mismatched replacement? Use the old part’s manufacturer or model information when available, and compare it with the listing’s connection details. Do not choose by color or general “pool return” wording alone. If the old fitting is damaged or hard to identify, consult a pool professional with the part and measurements.
Frequently Asked Questions
Are all fiberglass pool return fittings interchangeable? No. Connection type, thread size, body shape, and sealing arrangement can differ. Match the replacement to the existing fitting and plumbing.
What does FIP mean on a pool return fitting? FIP means female iron pipe, commonly used to describe internal pipe threads. Check the listing’s size and thread details before buying.
What is the difference between slip and threaded fittings? A slip fitting is identified by a slip connection, while threaded fittings connect through matching male and female threads. They are different connection styles and should not be treated as interchangeable.
Are locknuts and gaskets important? They can be part of how a wall fitting is secured and sealed. Check what the replacement includes and what your installation requires.
Can an SP1023-style fitting work with any pool? The listed models describe use with specified 1-1/2-inch FIP returns and a range of pool types, but compatibility still depends on matching the existing connection and installation.