Blagdon Metal Air Valve Outlets – 10 & 18 Way

Blagdon Metal Air Valve Outlets for Pond Oxygenator Pumps

Control separate airlines from one compatible pond air pump

The Blagdon metal air valve outlet distributes air from a compatible Blagdon Pond Oxygenator air pump into several individual airlines. Each branch has its own adjustable tap, making it easier to balance the supply between air stones in different positions. Choose the 10-way or 18-way option to match the replacement part you need and the layout of your aeration system.

This is the external air distributor, also commonly called a manifold. It is separate from the pump’s internal valve chamber, diaphragm and motor. If your existing distributor is damaged, or you need the corresponding Blagdon replacement assembly, check the part reference in the table below. The pump, airlines and air stones are separate products.

Choose your outlet assembly

Option	Blagdon reference	Listed pump compatibility
10-way metal valve outlet	1057387	Pond Oxygenator 1800 and 2400
18-way metal valve outlet	1057394	Pond Oxygenator 2400 and 3600

These are the model combinations shown on Blagdon’s individual spare-part pages. Use the model name on your pump and its parts information when choosing. The number of taps on a distributor is not the air pump’s output rating, and a larger distributor does not make the pump produce more air. It gives you more separate connections to arrange within the capacity of the existing pump.

The photographs show the corresponding metal outlet assembly and connection pieces. Check your existing pump outlet and connector before fitting. Do not choose solely because an assembly looks similar to a manifold from another brand: the connection arrangement must be right for the equipment. If you are replacing a part on an older pump, its model label and original part reference are particularly useful.

What the individual taps allow you to do

A separate tap on each branch lets you adjust one airline without moving all the air stones. This is useful when one part of the pond needs a gentler bubble pattern or when you are distributing air between a pond and compatible filter chambers. Make small adjustments, observe the results and check the other connected stones after changing one branch.

Think of the distributor as a way of managing the air already available. It is not a pressure booster, an additional pump or a substitute for choosing an air pump with enough capacity. Splitting the supply across more outlets shares that supply between more destinations. Plan the number of stones you actually need, their positions and the airline route before deciding which outlet assembly is appropriate.

Plan the airline layout before installation

Sketching a simple route from the pump to each stone can help you work out where the distributor should sit. Keep the taps accessible so that later adjustments do not require dismantling other equipment. Route tubing where it will not be crushed by a lid, folded sharply around a corner or pulled tight as equipment is moved for cleaning.

Use airline that matches the actual outlet connections and check that it fits securely. A loose connection wastes air before it reaches the stone. Conversely, forcing the wrong tubing over a connector can damage the tube or make future servicing awkward. If a length of old airline has hardened or split at its end, deal with that connection as part of the replacement rather than expecting a new distributor to repair it.

Fit and operate the assembly correctly

Isolate the air pump before working on the assembly. Blagdon’s Pond Oxygenator instructions call for the pump to sit above pond water level to protect against back-siphoning; where that is not possible, the manual specifies a check valve in each airline. The adjustable taps on this manifold are flow controls, not automatic non-return valves.

The manual also advises running the pump with minimal restriction and ideally connecting airline and an air stone to each outlet. Avoid shutting down the whole air supply with the manifold taps. Follow the instructions for your particular pump and outlet arrangement when dealing with unused connections, and keep a clear path for the air the pump is producing.

Check the whole air system if performance drops

Start by looking for a disconnected line, kinked tubing or a tap that has moved from its intended position. If just one stone performs poorly, inspect that branch. If every stone weakens together, consider the pump and its air intake as well as the distributor. Replacing an external manifold will not restore a worn internal diaphragm or clear a blocked air stone.

Blagdon recommends regular attention to air stones and Pond Oxygenator annual service components. Keep a note of when you last serviced the system and inspect connections whenever you clean the pond equipment. The aim is to identify the part that actually needs replacing, while leaving sound components in service.

Build a compatible aeration system

Match this spare to your existing Pond Oxygenator and choose the outlet count you need before ordering. If you are planning a new system, choose the pump first and then the suitable distributor, airlines and stones. Contact That Pond Guy with the pump model and a clear photograph of the connection if you need help identifying the correct replacement.