Which spanner fits which pipe size?
Reach awkward fittings. Finish compression jobs faster.
100,000+
HeatLab tools sold
UK designed
by a heating engineer
Lifetime
HeatLab warranty
2 sizes
no filler in the set
LESS BULK · MORE CONTROL · FASTER JOBS
Spend less time fighting
for access.
Behind boilers, under sinks and between close pipework, extra bulk costs time. These fixed-size spanners are slim, compact and ready for the fittings you meet every day.
01
Reach restricted fittings
A slim head and 22cm body get into spaces where a wide adjustable can be awkward.
02
Grip the flats properly
Fixed-size, parallel jaws give full-face contact instead of loading the nut corners.
03
Carry only what earns its place
24mm and 32mm cover common 15mm and 22mm compression work—without filler sizes.
PRECISION JAWS · TRADE-GRADE STEEL
More than a slim
handle.
The jaws are made to sit flat and parallel on the nut, giving stable contact and dependable hand torque. The steel and finish are specified for repeat trade use.
STEEL
42CrMo chrome-molybdenum
HARDNESS
32–39 HRC,
batch tested
JAW TOLERANCE
ISO 691 Class 1
FINISH
Black zinc-nickel,
≥12µm
TWO SPANNERS. CLEAR JOBS.
Grab the right size
without the guesswork.
24
mm
For common 15mm
compression work
Fixed-size control for the smaller valve and fitting nuts you meet on everyday jobs.
32
mm
For common 22mm
compression work
The larger jaw gives a stable hold on bigger compression nuts and pipework.
Fitting sizes can vary by manufacturer. Check the nut size before use.
WHY A DEDICATED SET?
Use the adjustable when you need it. Use these when access matters.
ON THE JOB
HEATLAB SET
TYPICAL ADJUSTABLE
Restricted access
✓
Slim fixed-size head
Can be bulky
Jaw movement
✓
No adjustment to drift
May need re-setting
Contact
✓
Flat, parallel jaws
Depends on adjustment
Toolbag
✓
Two compact essentials
Useful, but heavier and wider
PLUMBER-FEEDBACK-LED DESIGN
Shaped by the
people who use
them on site.
Developed in the UK with feedback from working plumbers and heating engineers, then tested on real compression work. The result is a slimmer profile, practical 22cm length and two useful sizes—not a bundle padded with tools that stay at the bottom of the bag.