Jabsco Water Inlets & Pressure Regulators

Jabsco Water Inlets & Pressure Regulators: Dockside Protection Built for Boaters

When you tie up at a marina and connect to the dock's water supply, your boat's onboard plumbing faces an invisible threat: unregulated city water pressure. Dock water pressure can run as high as 125 psi — far too aggressive for a boat's water tank, pumps, and plumbing components, which are designed to operate safely at around 45 psi. That pressure gap is exactly what Jabsco water inlets and pressure regulators are engineered to close.

Why Jabsco Is the Trusted Name in Marine Water Management

Jabsco's story began in 1938, when founder Jack Bibby, frustrated with the large, bulky, and unreliable pumps available at the time, designed and built his own compact marine pump. That problem-solving instinct still defines the brand today. Jabsco holds over 300 patents on technologies it invented that have since become industry standards. When it comes to marine water systems specifically, Jabsco is the leading supplier of fresh water pumps, waste systems, and general-purpose pumps for marine use, supplying boat builders worldwide.

That depth of expertise translates directly into their Water Inlets & Pressure Regulators lineup. These are not afterthought accessories — they are purpose-engineered components designed to work seamlessly with the broader Jabsco water system ecosystem.

What Jabsco Pressure Regulators Do — and How They Do It

Designed for day and night protection of the entire plumbing system from unregulated city water hook-ups, Jabsco regulators maintain regulated output at low or high flow rates, whether connected to a dockside main or a campground faucet. A removable strainer protects valves and seal-seats from pipe scale and other debris — a detail that reflects the real-world demands of marina life.

Jabsco offers two primary form factors in this category: a permanently installed flush mount model and an in-line model, with both featuring brass GHT fittings for potable garden hose connection. Flush mount models use 3/4" FGHT garden hose inlets with 1/2" NPT male outlet connections, while in-line models feature 3/4" FGHT garden hose inlet and 3/4" MGHT garden hose outlet.

Key Features to Know

• Limits inlet water pressure to 45 PSI (3.1 bar) and maintains regulated pressure at various flow rates — incoming pressures from 46–125 PSI are regulated down, while lower pressures pass through unregulated.
• Built-in backflow preventer, dust cap, and a removable easy-cleaning strainer to protect downstream plumbing.
• Manufactured of food-grade materials, making them suitable for potable water systems.
• Flush mount models install permanently for a clean, integrated look.
• Each regulator is packaged with multiple fitting options — including a 1/2" straight hose barb, a 1/2" 90° elbow hose barb, and a straight 1/2-14 NPT fitting — to cover a variety of installation scenarios.
• Available in white and chrome finishes to suit different vessel aesthetics.

Marine and RV Applications

Jabsco water pressure regulators protect your boat's water system from damaging pressures of unregulated city water hook-ups with a built-in backflow preventer, and are federally and state-required on RVs with water service hookups — making them equally at home on a cruising sailboat or a weekend camping rig. Jabsco products are engineered to withstand punishing marine environments, with corrosion-resistant materials, innovative designs, and rigorous testing instilling the legendary reliability the brand is known for.

Whether you're outfitting a new build or upgrading an aging system, Jabsco's water inlets and pressure regulators deliver the kind of set-and-forget reliability that serious boaters demand. Explore the full Jabsco brand catalog or browse all Water Inlets & Pressure Regulators to find the right fit for your vessel.