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Copper 90-degree street elbow, 1-inch press-fit to FTG, EPDM O-ring

Viega

Viega ProPress 90° street elbow 1" x 1" 77057

SKU CH-5SRA-BYANG

Copper 90° street elbow for 1" press-fit potable-water lines, rated 200 psi at 250°F

  • Press-fit copper installs fast without soldering
  • 90° street elbow redirects flow in tight spaces
  • EPDM O-ring seals potable water up to 200 psi
  • Rated for 250 °F hot-water service
  • Meets ASTM B75 and B88 copper standards

ProPress 90° Street Elbow 1

The Viega ProPress 77057 is a copper press-fit street elbow designed for potable water systems. It joins a 1 in copper tube to a 1 in fitting end using a 90 degree turn. The EPDM O-ring provides a seal rated for 200 psi at 250 Degrees F. The fitting meets ASTM B75 and ASTM B88 standards.

Plumbers Using Press Tools

This elbow suits installers who use Viega ProPress tools on copper tube for hot and cold water lines. It is not for technicians who require a threaded, soldered or push-fit connection. Buyers working with PEX, CPVC or steel pipe need a different fitting type. Systems exceeding the 200 psi or 250 Degrees F limits must use alternative components.

Press-Fit Copper to Fitting End

The defining specification is the press-fit connection on Side A and the FTG fitting end on Side B, both sized for 1 in copper tube. This geometry dictates whether the elbow integrates directly into a ProPress copper assembly without additional adapters. Verify tube size and connection method before ordering.

Highlights

  • Press-fit copper installs fast without soldering
  • 90° street elbow redirects flow in tight spaces
  • EPDM O-ring seals potable water up to 200 psi
  • Rated for 250 °F hot-water service
  • Meets ASTM B75 and B88 copper standards

Specifications

BrandVIEGA

Questions about this item

How much heat can the 250 Degrees F rated copper elbow handle in a continuously running hot-water loop?

The copper body and EPDM o-ring are rated for a maximum operating temperature of 250 Degrees F, so the fitting will not degrade in a loop that stays at or below that limit.

Which tool must I already own to press the 1 in press-fit end of this 77057 elbow?

You need a ProPress-compatible press tool and the correct 1 in jaw set to create a leak-free joint on the press-fit side.

Will the 1 in FTG end slip into the 1 in copper tube I already have installed to ASTM B88?

Yes, the FTG end is sized for 1 in copper tube made to ASTM B88, so it inserts directly into your existing tube for a press connection.

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