Diagram showing how the Venturi effect works in unequal pressure situations.
Fast moving cold water creates a suction effect, boosting hot water flow into the mixer outlet.
Venturi jet speeds up cold water flow.
Cold water at high pressure enters the Venturi jet.
Mixer for ALL PRESSURES In this article, Felton give the lowdown on installation and maintenance of Fusion Plus®—their all pressure shower mixer technology.
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he patented Fusion Plus® shower mixer is designed and assembled in New Zealand with ease of use in mind, both for plumbers and homeowners.
Unequal pressure situations Fusion Plus® technology uses the Venturi effect to provide great flow and temperature control on unequal pressure. For homes on unequal pressure, Fusion Plus® is fitted with one of two Venturi jets, which have been optimised for specific
hot water pressures: one for 36kPa and one for 76kPa. Both jets can be installed from the outlet of the shower mixer, which means it can be set up without having to disassemble the mixer and disturb the leakproof factory seal. To install the Venturi jet, use the Allen key provided to screw the jet into the inlet thread end first until the mark on the key aligns with the end of the mixer outlet. On high or low equal pressure, fit the mixer as supplied, with no Venturi jets needed.
IMPORTANT Ensure the Venturi jet is screwed in firmly thread end first until the mark on the key aligns with the end of the mixer outlet. How to install the Venturi jet. Using the Allen key provided, screw the Venturi jet into the inlet thread end first. The Allen key is a tight fit and will require a hard push to fully engage in the jet.
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