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Weber 79177 manifold valve assembly natural gas 4.5 inch Summit 670 BB part

weber

weber 79177 MFLD VLV ASSY NG 4.5INSUM 670 '12 BB appliance part

SKU CH-PSS5-QZA3W

Natural-gas manifold valve assembly for Summit 670 and 660 grills, fits 28 models from 2008 and 2009

  • Sold asEach
  • Product typeGrills & Accessories
  • Genuine Weber replacement ensures reliable grill operation
  • Part number 79177 supersedes previous 70878 for current supply
  • Fits 28 Summit models including S-670 and S-660 series
  • Designed for natural-gas 4.5-inch manifold valve assembly
  • Compatible with 2008 and 2009 production years

Replacement manifold valve for Summit S-670 NG

The Weber 79177 manifold valve assembly fits Summit S-670 natural gas grills produced in 2008 and 2009. It replaces the former part number 70878 and is sold individually for owners restoring factory gas flow.

Upgrading from worn or leaking valve assemblies

This part addresses cracked housings, stuck regulators or corroded ports that cause uneven flames or gas odour. The jump is worth it when burners fail to light consistently or when a pressure test shows internal leakage.

Direct bolt-on installation with basic tools

Installation requires disconnecting the gas supply, removing the control panel and swapping the manifold using the original mounting points. Common issues include cross-threaded inlet fittings and forgetting to leak-test every joint with soapy water before first ignition.

How it compares

Measured against everything we stock in Replacement Grill & Appliance Parts, at today’s prices. Recalculated every night.

Price $345.99
Pricier than about 93% of the 1,446 comparable items (median $36.99).

Specifications

Product
Brand nameWeber
Part numberWEB79177
Product typeGrills & Accessories

Questions about this item

What grill models does the 79177 manifold valve assembly fit?

It fits 28 Weber Summit models including S-670 NG from 2008 and 2009, S-660 NG built-in from 2009, and serials 292001, 292101, 294001, 294101, 298001, 298101, 2870501, 2880001, 2880301, 7292001, 7292101, 7460001, 7470001, 7471001, 9292001, 9292101, 9294001, 9294101, 77460001, 77470001, 77471001, 92880301, 97460001, 97470001, 97471001.

How is the manifold valve assembly installed and what step is often missed?

Shut off the gas supply, remove the control panel to access the old valve, disconnect the gas line and ignition wires, fit the new 79177 assembly using the original mounting points, reconnect the gas line and wires, then test every connection with soapy water before lighting — the leak test is the step most often skipped.

What maintenance or replacement will the manifold valve assembly need later?

Inspect the valve body and gas connections annually for corrosion or spider webs; replace the assembly if the valve sticks, leaks at the 4.5 in summit fitting, or if the ignition fails to spark after cleaning the electrode.

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