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White CPVC inline check valve with FNPT and socket ends

HAYWARD POOL PRODUCTS INC

HAYWARD POOL PRODUCTS INC TC20125ST 1-1/4" FNPT Socket CPVC Check Valve trap

SKU CH-VMW3-VHEK9 MPN TC20125ST

A 1-1/4 inch FNPT socket CPVC check valve for vertical drain lines, rated 30 gpm flow with Viton seals and a 3 psi cracking pressure

  • Product typeDrain Components
  • Main materialHAWA
  • Prevents backflow with inline true union design
  • Handles up to 235 psi water pressure at 70°F
  • Operates from 40°F to 190°F temperature range
  • Delivers 30 gpm full flow capacity
  • Viton seals resist chemical degradation

Hayward CPVC Check Valve 1-1/4

The Hayward TC20125ST is a true-union inline check valve built from CPVC with Viton seals. It suits pool and spa plumbing where a reliable non-return device is required. The FNPT-by-socket connections allow straightforward integration into 1-1/4 inch piping systems.

Thermal pressure limits and flow

The valve operates between 40 and 190 degrees Fahrenheit and withstands 235 psi water pressure at 70 degrees Fahrenheit. A cracking pressure of 3 psi ensures positive sealing without excessive restriction. Full-flow design delivers 30 gpm with minimal turbulence or noise in normal circulation.

Vertical mounting requirement

This check valve must be installed in a vertical orientation to function correctly. Horizontal or inverted installations will prevent the mechanism from opening and closing reliably. Verify piping layout accommodates vertical placement before purchase.

How it compares

Measured against everything we stock in Drain Stoppers, Strainers & Traps, at today’s prices. Recalculated every night.

Price $172.99
Pricier than about 83% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameHayward
Model nameTC20125ST
Product typeDrain Components
Size & build
Main materialHAWA

Questions about this item

How do I install the TC20125ST check valve with its FNPT x Socket connections and which orientation step is often missed?

Apply CPVC solvent cement to the socket end and thread sealant to the 1-1/4" FNPT end, then install with the flow arrow pointing vertically upward as required by the vertical mounting orientation.

Which seals on the TC20125ST will need replacement over time and what temperature range do they handle?

The Viton seat and seal handles 40 to 190 Degrees F; plan to replace them if they harden or leak after prolonged exposure to chlorinated water near the upper limit.

At what pressure does the TC20125ST reach its limit first during sustained flow at 70 Degrees F?

The 235 psi maximum water pressure rating at 70 Degrees F is the limiting factor; sustained operation above this pressure risks valve failure.

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