JABSCO InLine Non-Return Valve is a compact one-way water valve designed for installation within a marine pump suction hose. It helps maintain pump priming by limiting the return flow of water through the hose after pumping stops. By preventing water from flowing back from the pump into the bilge, the valve supports more efficient operation of bilge pumping systems and reduces the amount of water that must be lifted again during the next pumping cycle. JABSCO identifies this product range as suitable for 19mm, 25mm and 38mm internal-diameter hoses, covering common marine hose sizes used in boat bilge and water-handling installations.

This inline non return valve fits directly into the pump’s suction line and provides a simple connection between two hose sections. Its in-line arrangement makes it useful where a compact water non return valve is required without adding a large or complicated fitting to the plumbing system. Corrosion-resistant materials are used throughout, helping the valve suit marine environments where components may regularly be exposed to bilge water, moisture and humid conditions. The product is intended to control flow in one direction rather than regulate water pressure or operate as a shut-off valve.

Three hose connection variants are available. Part number 29295-1011 connects to a 19mm or 3/4-inch bore hose. Part number 29295-1000 is designed for a 25mm or 1-inch bore hose, while part number 29295-1010 connects to a 38mm or 1-1/2-inch bore hose. Each variant has a compact overall size of approximately 108mm long, 55mm wide, and 50mm high, allowing the correct version to be selected according to the existing pump hose diameter. The hose size should be checked before ordering because the three variants are intended for different internal hose diameters.

In a typical bilge pump installation, a non return check valve helps stop recently pumped water from draining back toward the lowest section of the bilge. This is particularly useful in suction pipework where maintaining a water column can assist the pump during its next operating cycle. Manufacturer installation information for compatible manual bilge pump systems recommends positioning an inline non-return valve close to the suction inlet when a suitable strainer with an integrated valve is not being used. Installation requirements may vary according to the pump, hose routing, and vessel layout, so the relevant pump instructions should always be followed.

The JABSCO valve may also be described as a marine check valve, bilge pump check valve, one-way hose valve, or inline water valve. It is suitable for buyers seeking a purpose-designed marine alternative to a general plumbing valve. Although searches may include terms such as PVC non return valve, the confirmed manufacturer information describes corrosion-resistant construction but does not specifically state that the body is made from PVC. The product should therefore be selected according to its confirmed JABSCO part number, hose connection, and intended marine pumping application.

Key Features:

• JABSCO InLine Non-Return Valve helps maintain pump priming and prevents water from flowing back from the pump into the bilge.
• One-way inline design for installation within marine pump hose.
• Fits into a pump’s suction hose as part of the bilge water system.
• Available for 19mm (3/4″), 25mm (1″) and 38mm (1-1/2″) bore hoses.
• Compact dimensions of approximately 108mm × 55mm × 50mm.
• Corrosion-resistant materials suitable for marine water-handling environments.
• Helps retain lifted water in the suction line after pumping stops.
• Straightforward hose-tail connections at both ends.
• Three identifiable variants for accurate hose-size selection:
  • 29295-1011 – 19mm (3/4″)
  • 29295-1000 – 25mm (1″)
  • 29295-1010 – 38mm (1-1/2″)
• Suitable for use as a marine non return valve or bilge pump check valve.

Applications / Suitable For:

• JABSCO InLine Non-Return Valve is suitable for marine bilge pump suction hoses where controlled one-way water flow is required.
• Manual bilge pump systems.
• Marine pump suction pipework.
• Boat bilge water removal arrangements.
• Bilge or sump installations where backflow needs to be limited.
• Replacement or new-build marine plumbing systems.
• Small boats, yachts, sailing vessels, and other craft using a compatible hose size.
• Installations requiring a compact inline non return valve.
• Systems using 19mm, 25 mm, or 38mm internal-diameter marine hose.

FAQs:

Q: What does the JABSCO InLine Non-Return Valve do?
A: It allows water to move in the required direction while helping prevent it from flowing back through the pump hose into the bilge. This also assists pump priming.

Q: Which hose sizes are available?
A: The valve is available for 19mm (3/4″), 25mm (1″) and 38mm (1-1/2″) bore hoses. Select the variant that matches the internal diameter of your existing hose.

Q: Where should this non return check valve be installed?
A: It is designed to fit inline within the pump hose, normally in the suction line. For relevant manual bilge systems, placing it near the suction inlet can help minimise water draining back into the bilge.

Q: Is the JABSCO InLine Non-Return Valve made from PVC?
A: The confirmed product information states that corrosion-resistant materials are used, but it does not specifically identify the valve body as PVC. It should not be described as a PVC non return valve unless additional manufacturer documentation confirms the exact material.