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White polypropylene 4-inch female coupler dust cap with EPDM gasket

Banjo

Banjo 400CAP 4" Female Coupler Dust Cap Trap

SKU CH-5ZG8-38GD6 MPN 400CAP

A 4-inch polypropylene dust cap with an EPDM gasket seals female couplers against debris at up to 100 psi

  • TypeDrain Components
  • Protects 4-inch couplers from debris
  • Polypropylene body resists chemical corrosion
  • EPDM gasket provides reliable sealing
  • Rated for 100 psi working pressure
  • Compact 3 11/32 in overall length

4" Female Coupler Dust Cap

The Banjo 400CAP is a 4-inch female coupler dust cap designed to protect pipe ends and couplings from debris. It suits plumbing professionals and maintenance crews who need a reliable seal for 4-inch coupling systems during storage or transport.

Thermals noise and power draw

This passive component generates no heat, produces no noise and draws no power in normal use. The polypropylene body and EPDM gasket handle a 100 psi pressure rating without active cooling or electrical supply.

Bundled accessories and software

The cap includes no locking arm and ships without additional hardware or software. Users must supply their own retaining method if a positive lock is required for the application.

Highlights

  • Protects 4-inch couplers from debris
  • Polypropylene body resists chemical corrosion
  • EPDM gasket provides reliable sealing
  • Rated for 100 psi working pressure
  • Compact 3 11/32 in overall length

Specifications

TypeDrain Components
BrandBanjo
Model400CAP

Questions about this item

How do I install the 400CAP dust cap on a 4 inch female coupler, and what step do people get wrong?

Push the cap over the coupler until the socket inside diameter of 4 47/64 in seats fully, then verify the gasket sits flat; the common error is leaving a gap that lets debris past the EPDM seal.

What maintenance or replacement will the 400CAP dust cap need later?

Inspect the EPDM gasket each season; replace the cap if the gasket cracks, hardens or no longer seals against the 4 19/42 in plug outside diameter.

What limit shows up first on the 400CAP dust cap under sustained pressure?

The 100 psi rating is the first limit; sustained pressure above that can deform the polypropylene body and unseat the gasket.

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