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The Pico standard compression hose must be used in conjunction with the appropriate adaptor for carrying out Engine Compression tests with the WPS500X.
Adaptors are available for the following spark plug thread sizes
M10 short reach TA213
M10 deep reach TA214
M12 deep reach TA216
M14 short reach TA217
M14 deep reach TA218
M16 for Ford triton TA19
M18 for older engines TA220
Please ensure that the adaptor you select is the same thread size and no longer than the tip of spark plug you are replacing. While using a shorter adaptor than the spark plug you are replacing may produce results that are slightly low using one that is longer may damage your engine.