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FlexPVC® Selection Guide: Which flexible pvc pipe, hose or tubing is best for my application? Flexible pvc pipe cut to length. Rigid Sch 40, Sch 80, Clear, White Glossy Furniture grade PVC pipe cut to length. 3 ways, 4 ways, 5 ways and 6 ways, Furniture Grade PVC Pipe Plastic Fittings. Snap Clamps to secure screen, tarps, fabric, etc to pvc pipe. PVC Plastic Pipe Fittings Selection Guide. Includes: 3 Ways, 4 Ways, 5 Ways, 6 Ways, Tees, Elbows, Male & Female Adapters, Couples, Unions, Reducer Bushings, Caps, Wyes, and 45 degree, 22 degree & 11 degree elbows.

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The chart below only applies to the 473-xxx series of Venturi Tees on this page.

473-xxx Venturi Tee Details & Specs (scroll down to order)

See our Venturi Video on Youtube if you don't want to read all the stuff below. ;-)

Note: The numbers in green are the pressure differential needed to achieve the vacuum in the vacuum port of the Venturi. The pressure differential is the difference in pressure between the input and output of the Venturi tee. As an example suppose you had a tank 10' tall with 10' of water column in it. 10' of water column converts to about 4.5psi. Now lets say you want your Venturi to pull 15inHg of vacuum. What that means is you need 22 or 23 GPM thru the Venturi. So you look in the chart on the right and you will see 20 and 25GPM. Now you decide to run a 3/8" nozzle in the Venturi. You can see you need between 72.6psi (at 20GPM) and 119.3psi (at 25GPM) so you can extrapolate you will need about 96psi ((72.6+119.3)/2). However the tank water column has about 4.5psi on the output of the Venturi. So you will need about 100psi at the input of the Venturi (96+4.5). So you will have to have a pump that will provide about 100psi thru a 3/8" opening. Or if you wanted to use a 1/4" orifice you need a pump that could put out about 485psi. ((369+599)/2+4.5)). Or if you used a 1/2" orifice (you'd have to drill out the 7/16th orifice to do this) you could use a pump with 36psi ((23.4+37.5)/2+4.5). If you wanted a different vacuum you'd have to redo the whole calculation. So you can see it's easier to use a larger orifice. However if you are using several Venturi tees off one pump, very quickly you can run out of pump. For example it's easy to find a pump that will do 36psi at 25GPM, but if you had 5 Venturi Tees that be 36psi at 125GPM, which would be about a 3-5hp pump! This is where the Pump Flow Chart comes in handy. Most of the pumps we sell have a flow chart that shows pressure (PSI) as a function of flow (GPM). So you will need to calculate what vacuum you want and the number of Venturi Tees you want and then find a pump that will provide the pressure and volume needed.

473-825-1 Venturi Tee 3/4 x 3/4 x 1 x 1/4 nozzle
473-825-1 Venturi Tee 3/4 x 3/4 x 1 x 1/4 nozzle - PVC-Venturi-Tees

Venturi T, 3/4" Slip socket/1" spigot in, 3/4 slip socket/1" spigot on the venturi feed (with 1/4" venturi orifice) and 1" slip socket on the exit. Orifices are changeable if you have access to the exit side of the venturi. Other size orifices available. (This is Venturi Tee is the smaller one shown in the picture. Tee has flow arrow imprinted on Tee to indicate flow direction.)

Price: $5.18


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