Van de Lande

Van de Lande threaded adapters and pipework fittings for swimming pools

Pool pipework is rarely built from a single size. A pump may be tapped for one thread while the filter, valve or heat pump next to it expects another, and the only tidy way to bridge the two is a threaded adapter. Here you will find Van de Lande fittings of exactly that kind: compact plastic components that change thread size or thread gender in a single step, so a pipe run can be completed without re-plumbing a whole section. They sit in the same family as the unions, sockets, bushes and nipples that make up a typical plant room, and they are usually the smallest and least expensive part of an installation that is holding everything else together.

What this range covers

The listing is focused rather than broad. It is built around step-type adapters that carry a female thread on one side and a male thread on the other, allowing a smaller tapped port to be converted upwards or a larger fitting to be brought down to a smaller connection.

• Threaded adapter 1.5″ FPT to 2″ MPT (1374063) – female pipe thread on the 1.5″ side, male pipe thread on the 2″ side, giving a single-piece step between the two most common pool pipe sizes.
• Size pairings – 1.5″ and 2″ threads are the sizes most often found on pump housings, multiport valves, filter inlets and heater connections, which is why adapters between them are so frequently needed.
• Thread-to-thread conversion – no solvent welding is involved in the fitting itself; it screws between two existing threaded components.
• Plant room use – typical positions are between pump and valve, between valve and filter, or where a bypass line is taken off a main circuit.

Choosing and fitting the right adapter

Thread descriptions are easy to misread, so it pays to check a few points before ordering. FPT means the thread is internal and the mating part screws into it; MPT means the thread is external and screws into something else. Confusing the two is the most common reason an adapter arrives and will not go on.

• Measure the port, not the pipe – a 1.5″ thread is nominal, not a tape measurement. Compare it with a fitting you know, or count how the existing connection is described on the pump or valve label.
• Check the direction of the step – decide which side needs to be female and which male, then match that to the description rather than assuming it can be reversed.
• Confirm the thread form – tapered and parallel threads look similar but seal differently; if the existing component is parallel it will normally rely on a flat gasket or O-ring at the face.
• Plan the pipe side – a 2″ male thread is usually taken onwards with a threaded union or socket, which in turn accepts the matching solvent-weld pipe size.
• Allow room to turn – an adapter adds length, so check there is clearance before the next bend or wall.

When fitting, wrap the male thread with several turns of PTFE tape in the direction of tightening, or use a thread sealant suitable for plastics. Tighten by hand and then only a little further with a strap wrench; plastic threads split easily if a pipe wrench is used, and over-tightening is far more likely to cause a leak than under-tightening. Fill slowly and check the joint under pressure before closing up any pit or cabinet. If a connection weeps, strip it back and re-tape rather than forcing another half turn.

Why small fittings matter

Adapters and bushes are usually the parts that fail an upgrade. A new pump, a replacement filter or an added heat pump will often arrive with ports in a different size from the pipework already in the ground, and the choice is either to cut and re-glue a length of pipe or to resolve it with a single step fitting. Keeping the correct adapter to hand means a service visit or a seasonal swap does not stall. It also keeps the circuit tidy: one well-chosen component is less restrictive and less leak-prone than a stack of improvised reducers.

Van de Lande at PoolParthub.com

Here we list Van de Lande fittings alongside the pumps, filters, valves and pipework parts they are normally installed with, so a replacement part and the adapter needed to connect it can be found in one place. Each item is shown with its part reference, such as 1374063, which is the quickest way to be certain of the thread sizes and the direction of the step before ordering.

The selection is kept practical rather than exhaustive: the sizes that come up repeatedly in pool plant rooms across Europe, described in plain terms so the right component can be identified from a port label or an exploded parts diagram. If a pipework detail is unclear, note the thread sizes at both ends and whether each is internal or external, and the correct fitting is usually straightforward to pin down.