Oase AquaMax 3500 / 5500 / 8500 Hosetail and Nut – 33580

Oase 33580 hosetail and nut for original AquaMax pumps

This is the replacement hosetail and nut listed by Oase as part 33580 for the original AquaMax 3500, AquaMax 5500 and AquaMax 8500 pumps. The manufacturer’s original 29286/08B manual places it at position 5 in the exploded parts drawing. Choose it by the exact pump generation and spare-part reference.

It is a connection spare, rather than a complete pump. Keeping an older pump connected correctly can be useful when the pump itself still operates properly and the original fitting is the part that needs replacing. Check the pump’s label, manual and existing connection before ordering so the replacement is selected for the right equipment.

Confirmed original-model compatibility

Original pump named in the manual	Position 5 reference	This listing
AquaMax 3500	33580	Compatible original-generation reference
AquaMax 5500	33580	Compatible original-generation reference
AquaMax 8500	33580	Compatible original-generation reference
AquaMax 2000 in the same manual	34507	Different part; not this listing

The names above refer to the original pumps covered by that manual. A newer pump with Eco, Eco Classic, Premium, E, C or another generation identifier in its name must be checked against its own spare-parts list. A similar flow-rating number is not enough to establish that two pumps use the same connector.

How to identify the right spare before ordering

Read the complete model name on the pump rather than relying on a remembered number or an old order description. Retain any generation suffix. Find the matching parts diagram, locate the connection assembly and compare its reference with 33580. This is a better purchasing check than comparing only the colour or general shape of a fitting.

If the old connection has already been removed, keep its components together until the replacement is identified. Note how they were arranged and check whether another component is damaged as well. Ordering a new hosetail does not resolve a damaged pump connection, missing support or an unsuitable length of hose elsewhere in the system.

What is supplied

The supplier describes this item as the AquaMax hosetail and nut. It is sold as one replacement assembly under reference 33580. A pump, hose, hose clip and additional seal set are not promised as part of this listing. The original exploded drawing is a reference for part identification, not a photograph of every item included in a delivery.

Keep the distinction between the threaded pump connection and the hose connection clear. Hose is selected by its actual internal diameter; the attachment to the pump must match the pump’s specified fitting. Do not assume that a generic threaded adapter is an equivalent replacement simply because one of its dimensions looks similar.

Check the hose and support as part of the repair

A sound replacement connector needs a suitable hose route. Inspect the existing hose for damage, persistent kinks or a poor fit at the connection. Measure the hose and compare it with the connection details before buying another length. The hose should not force the fitting into an awkward angle or carry unnecessary tension at the pump.

Our heavy-duty flexible pond hose is available in separately specified sizes. Choose the actual bore required by your installation. A heavier hose is still a separate purchase, and its size should be checked against the original fitting rather than inferred from this spare-part number.

Where the installation requires a clip, compare our stainless steel hose clips by their stated clamping range. The right clip must suit the assembled hose outside diameter and the fitting. A clip that is too large or forced beyond its range is not a useful substitute for selecting the correct size.

Fitting and checking the completed connection

Isolate the pump and associated pond equipment before handling the connection. Follow the original pump instructions for dismantling, fitting and restarting. Work with the pump and hose supported so that the connector is not being used to hold their weight. Inspect the mating surfaces and existing seal arrangement before putting the connection back together.

After reassembly, check the connection and water route when the pump is restarted. Look for leakage, an unsupported hose or a connection that moves when the hose is adjusted. A repair should restore the intended connection; it should not hide another damaged part or rely on excessive force to make unlike fittings meet.

Compare other fittings without confusing compatibility

We also list the Oase 25218 1½-inch stepped hosetail. It is a separately identified fitting, not an automatic substitute for 33580. Use the model’s own parts list to decide which reference belongs to your pump. Having the different references available makes it easier to compare the correct part rather than order by appearance.

Before purchasing, confirm the full pump name, original generation, position-5 reference and the condition of the remaining connection components. This listing supplies the original AquaMax 33580 hosetail and nut for the three confirmed models above. Matching those details first helps keep a small spare-parts order accurate and the subsequent repair straightforward.