Benchy Sparkling Zero | Under Bench Setup
Benchy Sparkling Zero units have either 8mm or 6.35mm (1/4") duotight (push-fit) bulkhead connectors for Sparkling Out and Chilled Out. All Benchy Sparkling Zero units have 6.35mm (1/4") fittings for Water In.
Units purchased before June 2026 will have 8mm fittings. Units purchased after this time have 6.35mm fittings and can be distinguished by diffeent plumbing arrangement - see below.
The smaller the ID (internal diameter) of the line, the more restriction. This is desirable for sparkling water setups as the increased restriction will slow the flow rate of the sparkling water from the Benchy Sparkling to the tap. If the sparkling water pours too quickly, this can cause carbonation to be knocked out of solution when it hits the glass.
Thus, 3mm ID EVABarrier is recommended for sparkling water.
Remove the blue circlip and duotight plug from the Sparkling Out fitting. Once removed, insert a length of KL25331 3mm ID x 6.35mm OD EVABarrier into the fitting. Replace the blue circlip once installed.
The smaller the ID (internal diameter) of the line, the more restriction. This is desirable for sparkling water setups as the increased restriction will slow the flow rate of the sparkling water from the Benchy Sparkling to the tap. If the sparkling water pours too quickly, this can cause carbonation to be knocked out of solution when it hits the glass.
Thus, 3mm ID EVABarrier is recommended for sparkling water.
Insert KL42642 into the SPARKLING OUT push in fitting. Once installed, insert a length of KL25331 into the fitting.
6.35mm (1/4") is a very common plumbing fitting size, so this line is generally quite easy to connect to your tap. If using either KL23917 , KL42932 or then no additional fittings are required. The 6.35mm OD EVABarrier can be inserted into the included 6.35mm duotight fittings once these are attached to the tap.
Insert 4mm x 8mm EVA Barrier hosing (sold separately ) directly into the SPARKLING OUT push in fitting. Attach this 4mm x 8mm ID EVA Barrier Tube to your sparkling water tap
If your tap features a 6.35mm OD fitting then the 4mm x 8mm ID EVA Barrier hosing can be stepped down using a duotight 6.35mm x 8mm reducer () sold separately. A better alternative is to
The smaller the ID (internal diameter) of the line, the more restriction. This is desirable for sparkling water setups as the increased restriction will slow the flow rate of the sparkling water from the Benchy Sparkling to the tap. If the sparkling water pours too quickly, this can cause carbonation to be knocked out of solution when it hits the glass. It is not as important when pouring still, chilled water. However, using 6.35mm (1/4") OD line typically makes connection to the tap easier as it is a very common plumbing size.
Remove the blue circlip and duotight plug from the Sparkling Out fitting. Once removed, insert a length of KL25331 into the fitting. Replace the blue circlip once installed.
Insert KL42642 into the CHILLED OUT push in fitting. Once installed, insert a length of KL25331 into the fitting.
6.35mm (1/4") is a very common plumbing fitting size, so this line is generally quite easy to connect to your tap. If using either KL23917 , KL42932 or then no additional fittings are required. The 6.35mm OD EVABarrier can be inserted into the included 6.35mm duotight fittings once these are attached to the tap.
It is recommended to use 6.35mm OD line instead of 8mm OD line.
Insert 4mm x 8mm ID EVA Barrier hosing into the CHILLED OUT push in fitting. Attach this 4mm x 8mm ID EVA Barrier Tube to your chilled still water tap (if using your own tap)
To connect to the KL23917 - use the included 6.35mm joiner to connect to the barbs on the Dual Outlet Tap. Use a short length of included KL11143 - from the joiners. Connect the KL07481 - to the 6.35mm line, then connect the 8mm side of the duotight fitting to the Chilled and the Sparkling 8mm line out.
Please refer to the below
The Benchy Sparkling can also be used to dispense only sparkling water if preferred. To achieve this, simply plug the chilled still water OUT push in fitting with a
Before connecting your mains water up to the Benchy Sparkling ensure that the sparkling water and cold-water outlets are connected to a tap or plugged and all push in fittings are connected and all hosing is secure.
IMPORTANT: For first time setup, keep the mains water supplying the Benchy Sparkling off until the unit has been connected to all dispensing taps and CO2.
Install the included KL17756 onto your mains water supply valve which has a ½ inch thread. Run a length of KL11143 from the diverter valve to the KL42925 - . Install another length of 6.35mm PET Water Line from the inline pressure valve to the Water In on the Benchy Sparkling.
IMPORTANT: In order for the Benchy Sparkling to function correctly and to ensure there are no leaks the mains water pressure must be regulated to no more than 80psi (70psi is recommended). If the mains water pressure is not regulated then the internal float valve can be damaged by high pressure.
Damage to the float valve can cause mains water leaks and is not covered under warranty.
In order for the Benchy Sparkling to operate correctly, the CO2 pressure must be between 10-15psi less than the water pressure. Thus, with the KL42925 - installed, the CO2 pressure must be set to 55-60psi. This will typically provide a good level of carbonation.
If this level of carbonation is too high a KL26918 ) (not included) can be installed on the water line in order to lower the mains pressure from 70psi.
Ensure the tubing is pushed securely into each fitting.
In order to reach good levels of carbonation the included 65psi green PRV (Pressure Relief Valve) on the regulator needs to be swapped for the KL03070
Before attaching the regulator to the CO2 cylinder, unscrew the green PRV and replace with the grey PRV. This allows pressures over 60psi to be set without causing the PRV to engage.
Tightly connect the KL07429 to your CO2 cylinder (or ) and ensure the regulator pressure adjustment knob is turned completely counter clockwise to set the pressure at 0psi. Push KL06224 into the duotight fitting on the regulator and then push this tubing into the Gas Inlet push in fitting on the Benchy Sparkling.
IMPORTANT: After you have attached your Benchy Sparkling to your dispensing taps and connected your Gas supply and mains water supply EVA Barrier hosing to the push in fittings on the unit it is important to perform a leak test on the system. Failure to do so could result in your CO2 cylinder emptying faster than expected or water leaks occurring.
It is essential to perform a pressure (leak) test prior to dispensing any sparkling or cold still water from the Benchy Sparkling.
The Benchy Sparkling need to be pressure tested to a pressure that is at least 1.5 times the pressure that will be used for dispensing. For example, if your dispensing pressure is 70 psi then the pressure test should be conducted at around 100psi.
Ensure mains water into the Benchy Sparkling is turned off, the regulator adjustment knob is turned fully counter clockwise and the unit is connected too all dispensing taps
Set the CO2 pressure on the regulator to 1.5 times the dispensing pressure by turning the adjustment knob on the regulator clockwise until the correct pressure is reached
Turn the gas cylinder off and leave to sit for a few hours (overnight is preferred). Then check if the pressure on the regulator has decreased from the set pressure
If the pressure has dropped then this indicates that there is a leak in the system. The source of this leak needs to be determined and fixed before proceeding
Ensure mains water into the Benchy Sparkling is turned off, the regulator adjustment knob is turned fully counter clockwise and the unit is connected too all dispensing taps
Set the pressure on the regulator to 1.5 times the dispensing pressure by turning the adjustment knob on the regulator clockwise
Spray all connections with soapy water and look for the formation of bubbles. This includes all push fit connections and connections between the regulator and CO2 cylinder
If bubbles are formed at any of these connections this indicates a leak which needs to be fixed.
