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White double diaphragm pump trap with top and bottom ports

Dayton

Dayton 6PY38 Double Diaphragm Pump Trap 3.25 GPM

SKU CH-QKHS-1204Z MPN 6PY38

Air-operated double diaphragm pump delivers 3.25 GPM flow with PTFE diaphragms and acetal check seats

  • Product typeDrain Components
  • Double-diaphragm design delivers 3.25 GPM flow
  • PTFE diaphragms resist aggressive chemicals
  • Air-operated at 9 scfm for reliable cycling
  • Acetal check seats withstand abrasive media
  • 1/4 in NPT ports simplify plumbing connections

Double Diaphragm Pump for Fluid Transfer

The Dayton 6PY38 is an air-operated double diaphragm pump built from acetal with PTFE diaphragms. It suits workshops and light-industrial sites that need a chemically compatible, self-priming transfer pump for aggressive or viscous fluids.

3.3 gpm Maximum Flow Rate

The pump delivers up to 3.3 gallons per minute at peak operation, making it suitable for low-volume circulation, dispensing or evacuation tasks. Buyers who need higher throughput for bulk transfer or continuous high-pressure feed should size a larger unit.

1/4 in NPT Ports with Top Discharge

Both media intake and discharge use 1/4 inch NPT connections, while the air inlet is a 1/4 inch FNPT fitting. This compact port layout frees bench space and simplifies plumbing in tight enclosures, but it limits hose diameter and may require adapters for larger piping systems.

How it compares

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

Price $536.99
Pricier than about 90% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameDayton
Model name6PY38
Product typeDrain Components

Questions about this item

What does the 3.25 GPM flow rate mean when the pump is running in a system?

The pump can move up to 3.3 gallons per minute of liquid when supplied with adequate air pressure and unrestricted piping.

What air connection does the pump need and what limits its air consumption?

It uses a 1/4 inch FNPT air inlet and draws a maximum of 9 scfm of compressed air during operation.

How is the pump mounted and where do the fluid ports sit?

The unit has a single-port manifold with a 1/4 inch NPT intake at the bottom and a 1/4 inch NPT discharge at the top for inline installation.

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