This fitting is designed to give a 90 degree offset crossover. As there are two socket set screws in the sleeve, this Kee Klamp fitting can be used where a join is required in the horizontal pipe. For economy, it is possible to use a KK45 in place of the 145, using the 145 only where a join in the pipe occurs. When calculating the cutting lengths for pipe, dimension 'G' should be added to give the pipe length for the upright. To obtain the true height of the upright the allowance for the base fittings must be included.