what-are-the-parts-of-a-fixed-basin-wrench

What are the parts of a fixed basin wrench?

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Fixed basin tap wrench plumbing tools back tap nut spanner wonkee donkee tools DIY guide 1/2 inch 3/4 inch jaws
fixed basin tap wrench bath spanner back nut wrench tools plumbing wonkee donkee tools DIY guide The above picture shows the most common size of jaws: 1/2 and 3/4 inch.

Fixed basin wrench shaft

Fixed basin wrench, Basin Wrench Basin wrench 1/2in x 3/4in, (15 X 22mm) accurately manufactured from cast iron. Ideal for use in awkward places, eg. back nuts fitted to taps behind sinks or baths. The fixed basin wrench’s shaft is a solid metal bar that connects the two jaw ends together.

1/2 inch jaws on a fixed basin wrench

fixed basin wrench 1/2 inch jaws plumbing tools tap back nuts wonkee donkee tools DIY guide The jaws of a fixed basin wrench protrude perpendicular to the shaft. This set-up allows the wrench to be rotated along its vertical axis and therefore be used in much more confined spaces than a traditional wrench or spanner.

Although the jaws are referred to as being 1/2 inch, their actual internal width is 27mm. They are known as 1/2 inch BSP jaws because that is the size of the nut they are used on.

BSP = British Standard Pipe РA standard applied to thread size. So, a 1/2inch BSP nut will always fit a 1/2inch thread.

Fixed basin wrench, tap spanner, Basin Wrench Basin wrench 1/2in x 3/4in, (15 X 22mm) accurately manufactured from cast iron. Ideal for use in awkward places, eg. back nuts fitted to taps behind sinks or baths.

What does “rotating on the vertical axis” mean?

A fixed basin wrench is used differently to a traditional spanner because it rotates vertically, in line with the nut it is turning, as opposed to rotating about the horizontal axis like a traditional spanner or wrench. These wrenches will also work in the traditonal horizontal manner though few backnuts can be accessed from this angle.

3/4 inch jaws on a fixed basin wrench

3/4 inch jaws basin tap wrench bath spanner back nuts tap wonkee donkee tools DIY guide The jaws at the other end of a fixed basin wrench also protrude perpendicular to the shaft (though they face the opposite direction). These jaws are known as 3/4 inch jaws as they are used on nuts with this standardised dimension. The actual internal width of these jaws is 32mm.