Cash Acme EB45 Pressure Regulating Valve, 1/2 in NPT

Our review of the Cash Acme EB45 finds it best suited for homeowners and light commercial installers who need a compact, reliable water pressure regulator that is easy to install and locks in settings. The bottom line: this regulator delivers consistent downstream pressure with a tamper-resistant design and tool-free connection, making it a strong choice where a simple, durable pressure-reducing valve is required. The review focuses on installation, build quality, adjustability and a common nuisance reported by users.

Key Features

• Direct pressure cartridge: The half cartridge design gives direct access to the adjustment screw so pressure can be tuned without disassembling the entire valve.
• Tamper-resistant EB45 design: The locking feature secures the set pressure against accidental changes, useful for shared buildings and commercial installations.
• Tool-free connection: Stainless steel gripping teeth and an O-ring provide a quick, secure pipe connection without complicated fittings or adhesives.
• Durable materials: Brass, stainless steel and metallic components resist corrosion and are compliant with NSF/ANSI 372 for potable water systems.
• Wide operating range: Rated to 60 PSI nominal and adjustable from 10 to 70 PSI, it supports both hot and cold water up to 180F for versatile use.

Who It's For

This valve is aimed at plumbing professionals, property managers and homeowners who want a straightforward, adjustable pressure regulator that installs quickly and stays set. Its tamper-resistant lock and compact 1/2 in inline form make it ideal for retrofit work, meter rooms, point-of-use protection and smaller commercial systems.

Those who need ultra-quiet performance in extremely sensitive plumbing systems should be aware of user reports of a rhythmic thumping noise during flow; if absolute silence is required, consider evaluating alternate models or additional system damping before purchase.

Pros & Cons

Pros

• Easy, tool-free installation with a secure O-ring seal and stainless teeth for a tight fit.
• Tamper-resistant lock preserves the set pressure and prevents accidental adjustments.
• Solid construction from lead-free brass and stainless steel for longevity in potable systems.
• Adjustable range covers most residential and light commercial needs up to 70 PSI.

Cons

• Several users report a noticeable thumping noise while water flows, which may be distracting in some installations.

Specifications

Model	PVA08M-SUTH-60 (EB45)
Connection	1/2 in NPT Female x NPT Female, single union
Rated Pressure	60 PSI (adjustable 10 to 70 PSI)
Temperature	Rated for cold and hot water up to 180F
Materials	Brass, stainless steel and metallic components; lead-free compliant
Design	Half cartridge, tamper-resistant EB45 with tool-free installation
Application	Commercial and residential potable water pressure regulation

Our Verdict

The Cash Acme EB45 is a practical, well-built pressure regulating valve that offers quick installation and a tamper-resistant lock, making it excellent value for residential and light commercial use. It combines durable, lead-free materials with a useful adjustable range, though installers should account for reported flow noise in some systems. For those who want a reliable PRV that stays set and installs fast, this is a solid choice.

Frequently Asked Questions

Is this valve adjustable?
Yes, the valve is adjustable between approximately 10 and 70 PSI and is commonly shipped preset; the half cartridge provides direct access to the adjustment screw.

Can it be used with hot water?
Yes, it is rated for hot water service up to 180F and is suitable for potable water systems.

How does the connection work?
The EB45 uses stainless steel teeth and an O-ring for a tool-free, insert-style connection that grips the pipe and creates a secure seal.