An important feature of most screw-on intake pressure relief valves is that they

An important feature of most screw-on intake pressure relief valves is that they

• A. Have bleeder valves to vent air when the line is being charged
• B. Provide automatic flow regulation
• C. Include a built-in filter screen
• D. Require no maintenance

Answer: (A)

When charging or priming a suction line, air must be vented so water can fill the line and the pump can create a prime. A screw-on intake pressure relief valve that includes a bleeder valve provides an easy way to release trapped air during charging. Opening the bleeder lets air escape, water fills the line, and the suction side can reach proper pressure without air pockets, preventing loss of prime and cavitation. That’s why this feature is the best answer. Other options aren’t the primary purpose: automatic flow regulation isn’t what this valve is normally known for; built-in filter screens aren’t guaranteed on these valves and aren’t the defining feature; and claiming no maintenance ignores that valves typically require periodic inspection and servicing.

When charging or priming a suction line, air must be vented so water can fill the line and the pump can create a prime. A screw-on intake pressure relief valve that includes a bleeder valve provides an easy way to release trapped air during charging. Opening the bleeder lets air escape, water fills the line, and the suction side can reach proper pressure without air pockets, preventing loss of prime and cavitation.

That’s why this feature is the best answer. Other options aren’t the primary purpose: automatic flow regulation isn’t what this valve is normally known for; built-in filter screens aren’t guaranteed on these valves and aren’t the defining feature; and claiming no maintenance ignores that valves typically require periodic inspection and servicing.