We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Bronze inline ball cone check valve with FNPT threads

Apollo

Apollo 6110201 3/8" FNPT Bronze Ball Cone Spring Check Valve

SKU CH-PZG8-4G1QX

Inline bronze check valve with spring-loaded ball cone, 3/8" FNPT, 0.5 psi cracking pressure, EPDM seals, rated to 400 psi water and 125 psi steam

  • Prevents backflow with inline ball-cone design
  • Bronze body withstands up to 400 psi water pressure
  • Spring-assisted closure activates at .5 psi cracking pressure
  • EPDM seals handle 33 to 180 degrees F
  • Installs horizontally or vertically with FNPT connections

Purpose and fit

The Apollo 6110201 is a 3/8 inch FNPT bronze inline ball cone check valve designed for plumbing systems that need automatic backflow prevention. It suits installers working on water or steam lines where a compact, corrosion-resistant valve is required.

Deciding specification

The cracking pressure is .5 psi, so the valve opens with minimal forward flow and closes tightly against reverse pressure. This low threshold determines whether the valve will operate reliably in gravity-fed or low-head applications.

Installation context

The valve mounts horizontally or vertically and handles water pressure up to 400 psi and steam pressure up to 125 psi WSP. EPDM seals and an RPTFE seat tolerate temperatures from 33 to 180 degrees F, while the stainless steel spring resists corrosion. The FNPT x FNPT threads connect directly to standard pipe fittings without extra adapters.

Highlights

  • Prevents backflow with inline ball-cone design
  • Bronze body withstands up to 400 psi water pressure
  • Spring-assisted closure activates at .5 psi cracking pressure
  • EPDM seals handle 33 to 180 degrees F
  • Installs horizontally or vertically with FNPT connections

Specifications

BrandAPOLLO VALVES

Questions about this item

What does the 0.5 psi cracking pressure mean once the valve is installed in a real system?

The valve will begin to open and allow flow when upstream pressure exceeds 0.5 psi, preventing backflow until that threshold is reached.

How does the FNPT x FNPT connection type cap what pipe or fittings can be used with this valve?

Both ends have female National Pipe Taper threads, so the valve only accepts male NPT pipe or fittings of the same nominal size.

What physical space and orientation are needed to mount this valve in a plumbing line?

The inline ball-cone body fits in a straight pipe run and can be installed horizontally or vertically, with flow direction following the arrow on the body.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.