Lowara DOC 1 1/4" check valve - Anglian Pumping Services

Name: Lowara DOC 1 1/4" check valve
Brand: Lowara
SKU: swing125
Price: 34.8 GBP
Availability: InStock

In stock

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Established 1975
Trusted by thousands of customers

The Lowara DOC 1 1/4″ check valve is a 1¼″ check (non-return) valve that screws straight onto the discharge of a Lowara DOC submersible drainage pump.

It stops pumped water running back down into the sump when the pump switches off, so the pump isn’t restarting to pump the same water twice.

1¼″

Thread

DOC

Pump range

Screw-on

Fitting

Non-return

Valve type

Lowara DOC accessoryStops back-flowFits direct to pump

Fit with the flow arrow pointing away from the pump. Not sure this is the right model? Send us your application details and we’ll confirm before you order.

Full Description

More about this product

Full Description

The Lowara DOC 1 1/4″ check valve is a 1¼″ check valve made to screw directly into the discharge of the Lowara DOC range of submersible drainage pumps.

With the valve fitted, water in the discharge pipe can’t drain back into the sump when the pump stops. That means fewer starts, less wear and a sump that stays emptier between cycles.

Key specifications

Product	Check valve for Lowara DOC pumps
Connection	1¼″ thread
Fitting	Screws directly onto the DOC discharge
Function	Prevents back-flow into the sump

Features

Direct fit

Screws straight into the DOC pump discharge — no adaptors needed.

Stops back-flow

Holds the water column in the discharge pipe when the pump switches off.

Fewer starts

The pump doesn’t re-pump water that has run back, saving wear.

Simple service

Easy to remove for cleaning if debris builds up.

Built for

Cellar & basement sumps

Keeps the discharge line full between cycles.

Flood & drainage kits

Completes a DOC drainage set-up.

Garden & pond drainage

Stops water draining back after pumping.

Replacement

Swap out a worn or damaged valve.

FAQs

Which pumps does it fit?

It is made for the Lowara DOC range of submersible drainage pumps, which have a 1¼″ discharge.

Which way round does it go?

Fit it with the flow arrow pointing away from the pump, in the direction the water leaves.

Do I need one?

It isn’t essential, but it stops water running back into the sump and reduces how often the pump starts.

Delivery Information

Standard delivery:
Standard delivery is free on most orders. Some items may incur a delivery charge depending on weight, size or value. Any applicable charge will be displayed at checkout.

Deliveries will typically be made between 7am and 6pm, Monday to Friday (excluding public holidays).

Next day delivery:
Next working day delivery is available for a £16.50 + VAT delivery charge.

Orders must be placed before 12 noon to qualify for next working day delivery. Orders placed after 12 noon on Thursday but before noon on Friday will be delivered the following Monday. Orders placed after 12 noon on Friday will be delivered on Tuesday.

Pallet/Large/Difficult items:
Some large, heavy or difficult to transport items may incur an additional delivery charge. Please contact us for a delivery quote before ordering.

Frequently Asked Questions

Quick answers to common questions about the Lowara DOC 1 1/4″ check valve. For technical specifications, see the product details above; for sizing or installation advice, contact our team. If you have any other questions, we're happy to help.

What is a submersible pump?

A submersible pump is designed to operate fully submerged in the liquid it is moving. The motor is sealed inside the pump body and cooled by the surrounding water. Submersibles are used for drainage, sewage, septic tanks, deep wells and boreholes, and for raising water from sumps, cellars and floodwater. Many stocked at Anglian Pumping handle solids in suspension.

Can submersible pumps handle solids and sewage?

Yes – some submersibles are designed for clean water only, others handle solids up to 50 mm or full raw sewage. Anglian Pumping stocks ABS, BBC, Flygt and T-T Submersibles ranges that include vortex, single channel and grinder impellers for different solids handling requirements. Always match the pump to the maximum solid size and the type of effluent it will see.

When should I use a submersible pump instead of a surface pump?

Use a submersible when the water level is more than around 8 metres below the pump installation point – surface pumps cannot self-prime beyond that depth. Submersibles are also better when the liquid contains solids, when noise must be minimised, or when the pump needs to operate in confined spaces such as sumps and chambers where a surface pump would not fit.