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Gray metal sight glass with copper ends, 6 1/4 in long

Parker

Parker PSG-7S personal protective equipment

SKU CH-14MT-63PYN MPN PSG-7S

Sight glass with sweat fittings and copper ends, UL listed for 650 PSIG

  • Color and finishGray
  • UL listed for 650 PSIG system safety
  • Solid copper extended ends resist corrosion
  • Two-piece O-ring design prevents leaks
  • 73 in cut-out fits standard lines
  • Sweat fitting type for permanent joints

7/8 in Sight Glass

The Parker PSG-7S is a sweat-type sight glass built for refrigeration and air-conditioning lines. It uses solid copper extended ends and a two-piece O-ring design to provide a leak-tight view port. The body is finished in gray and carries a UL listing. Installers gain a clear visual check on refrigerant condition without interrupting the circuit.

Suitable installs and limits

Technicians working with 7/8 in copper tubing and needing a 650 PSIG rated window will find this part fits directly. It is not suited for systems that exceed the listed pressure or for pipe sizes other than 7/8 in. Buyers who need a different connection style or a higher pressure rating must select another model.

650 PSIG UL rating

The single figure that decides fitment is the UL-listed 650 PSIG maximum working pressure. If the installation operates at or below this pressure the sight glass is approved; if the system design calls for a higher rating this unit cannot be used. No other specification overrides this limit.

How it compares

Measured against everything we stock in Face Masks, Respirators & PPE, at today’s prices. Recalculated every night.

Price $39.99
Pricier than about 65% of the 5,612 comparable items (median $24.99).

Specifications

Product
Brand nameParker
Model namePSG-7S
Color and finishGray

Questions about this item

How do I install the Parker PSG-7S sight glass and which step is most often missed?

Braze the solid copper extended ends into the line, then verify the 4.73 in cut-out length before final assembly; the step most often missed is confirming that the O-ring seats fully after the braze cools.

What maintenance will the PSG-7S sight glass need over time?

Inspect the O-ring seal during routine system checks and replace it if any cracking or flattening appears; the glass body itself requires no scheduled replacement.

What pressure limit governs sustained operation of the PSG-7S sight glass?

The UL listing covers 650 PSIG, so sustained system pressure must stay at or below that rating.

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