Excessive Pressure from 2 HP Goulds Pump: Regulator vs. Relief Valve

A 2 HP Goulds pump on a lake intake delivers excessive pressure, risking pipe and head damage. The owner wants an adjustable pressure-reducing valve but dislikes the cost of brass regulators. The pump is on a pier with 1.5" PVC upsized to 2" through a retaining wall.

Pressure Relief Valve: Cost-Effective Alternative

A pressure relief (blow-off) valve set at the desired pressure (e.g., 45 PSI) dumps excess water when pressure spikes. Pipe the discharge back to the lake or a safe drainage area. These cost under $50 at pump/well supply stores.

Verify the Real Problem

Goulds pumps rarely produce pressure high enough to burst standard PVC. If pipes burst at the pump, the cause is often:

• Loss of prime / dead-heading: A valve fails to open, water heats in the casing, softening PVC.
• Check valve failure: Allows backflow, causing pump to run dry then surge.

Before installing a regulator, confirm all zone valves open reliably and the pump maintains prime. A relief valve is a good safety backup regardless.