Welcome to CASPAK® Online!


The CASPAK® Thermostatic Mixing Valve Selection Program has been developed to assist the design engineer in selection of master mixing valves as used in domestic water applications. This enhanced version CASPAK® is the first mixing valve sizing program to be issued online in the plumbing industry. It is intended to be used as a guide only and will allow the mechanical engineer more time for design considerations.

The mixing valve sizing program will select either a TM series valve, New Generation High/Low or XL Valve; along with any corresponding Megatron® configurations. It is to be used to size a mixing valve using hot and cold water only and not in applications where steam may be used. It is intended to be used to size only Leonard Thermostatic Mixing Valves and is NOT to be used as a cross reference guide. The sizing techniques applied in this program are based on parameters from the ASPE Data Book and the performance characteristics of Leonard Thermostatic Mixing Valves.

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*MY LEONARD VALVE USERS: If you have signed up for a free My Leonard Valve account, you will have the option to save your CASPAK® product results. YOU MUST be logged into your My Leonard Valve account before using CASPAK® in order to save your results. If you are not currently logged in, you can login here.

If you are not currently signed up for a My Leonard Valve account, you can do so for free by clicking here.