Specialists in Bespoke Solutions

How-to: Move a Swing Check Valve Lever

Screenshot from instructional video showing swing check valve and tools.

A valve's lever weight arm needs sufficient room for movement in order to operate, making valve adaptability to surrounding areas and space limitations an important factor when selecting a product. This video gives you a step-by-step guide on changing the side of a lever weight on a Swing Check Valve.

How to move a swing check valve lever weight and arm

  1. Remove the cover. Use a spanner to release all of the bolts, place these to the side for later.
  2. Lift the cover off to expose the gasket which is on the top.
  3. Remove the lever arm. Use a small spanner to remove the nut at the end of the shaft, which will release a nut, a spring washer and a penny washer.
  4. The lever weight arm should now pull off easily.
  5. Look into the top, loosen the locking screw by releasing it with a few turns.
  6. Take the bush nuts off from both sides by loosening them with a spanner.
  7. The standard nut is the one with a blind hole and the lever weight nut is the one with the through hole.
  8. Once both nuts are off pull the shaft out, rotate the shaft and push it back in.
  9. Reassemble the nuts on both sides. The blind hole now goes in the left side and the through hole nut goes on the right side, screw them both in all the way. Bear in mind that there are two internal O-rings which should be lubricated.
  10. Tighten the through-hole nut with a spanner and then affix your lever weight.
  11. Reapply the penny washer, spring washer and nut.
  12. Tighten up ensuring that in the state of no flow the lever arm hangs just below the horizontal.


The swing check valve is used in potable, wastewater and sewage applications to prevent reverse flow. To find out more about the range, including our same day dispatch products and technical data, use the link below.

For further advice and support with transferring a lever weigth arm, or for any valve queries, contact our experts by calling +44 (0)1630 547200, emailing ttflow@ttpumps.com or completing our online enquiry form.

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