Ashcroft 82137XLL Pressure Gauge 3.5 in 30-0-30 Psi Center Back

Product Description

The ASHCROFT 82137XLL is a dual-scale analog pressure gauge designed to measure both positive and negative pressure across a 30-0-30 psi range. The 3.5-inch dial provides clear readability in the field, and the 1/4-inch center back mount configuration suits panel installations and tight plumbing assemblies. The stainless steel case and stainless steel wetted parts deliver corrosion resistance in demanding service environments. Accuracy is rated at 1 percent of full scale, meeting typical requirements for HVAC, plumbing, and industrial process monitoring. This gauge ships dry with no liquid fill. Licensed plumbers, HVAC technicians, and process piping contractors are the primary installers.

The 82137XLL is suited for residential and light commercial applications where vacuum and pressure readings are both required on a single instrument. Common install scenarios include refrigeration system service ports, boiler circuits, compressed air panels, and pump discharge or suction monitoring. The center back mount allows the gauge face to sit flush against a panel or bracket without side-port clearance concerns. Where corrosive media or wet environments are a factor, the all-stainless wetted path reduces maintenance intervals compared to brass-wetted alternatives.

Key Features

• Dual-range scale reads 30-0-30 psi, capturing both vacuum and positive pressure on one gauge
• 1 percent of full-scale accuracy for reliable process and system diagnostics
• 3.5-inch analog dial improves readability at typical working distances
• Stainless steel case and wetted parts resist corrosion in wet or chemically aggressive environments
• Dry, no-fill construction eliminates liquid-fill leakage concerns during installation or service
• 1/4-inch center back mount fits standard panel and manifold connections

Compatibility

Designed as an OEM-style replacement or direct-install pressure gauge for residential and commercial plumbing, HVAC, and process piping systems requiring a 3.5-inch center back mount gauge with a 1/4-inch connection.

Installation Notes

Installation should be performed by a licensed plumber or qualified HVAC technician following applicable local codes and ASME B40.100 gauge installation guidelines. Isolate and depressurize the system completely before removing an existing gauge or making a new connection. Apply thread sealant appropriate for the media being measured and avoid over-tightening the 1/4-inch male thread, which can crack the socket or distort the bourdon tube. Do not use the gauge body as a wrench surface; apply torque only at the hex flats on the process connection.