Water Well Everything You Need to Know About Venturi Adapters

Venturi Adapters play a vital role in the functionality of deep well jet pump applications. While you might not physically see them around, it is important to understand their purpose in a water well system. In this blog, we will cover everything you need to know about Venturi adapters and well seal elbows.

If you are looking for a more technical explanation of their workings head over to Boshart Knowledge Base and check out our blog What is a Venturi Adapter and for What is it Used For? 

Let's dive in!

What are venturi Adapters?

Venturi adapters are used in deep well jet pump applications. image-png-Nov-09-2023-02-30-46-4135-PM.png copyThey get threaded into the deep well ejector body that is supplied by the pump manufacturer.

The extra long barrel design allows for the Venturi to be inserted directly into the adapter. This is where it gets its name.

The ejector body, along with the nozzle and venturi tube, is installed after the drive and delivery pipes down at the bottom of the well. 

How does it work in a Well System?

Water is pumped by the deep well jet pumpimage-png-Nov-09-2023-02-31-41-9669-PM located at the ground surface. The jet ejector which is composed of the nozzle and venturi can be found in the well below the water level.

In order to draw water from the well it must first be recirculated.  For example, if 4 gallons of water is pumped down the well through the drive pipe, it would then end up in the ejector body. The overall goal is to then send that water up through the delivery pipe. In order to do that, it needs to make a 180° u-turn through the nozzle and into the venturi tube which is located inside the venturi adapter. 

Forcing the water through the nozzle increases the velocity of the water creating a vacuum. The vacuum draws in an additional 1 gallon of water from the well up through the foot valve and suction pipe.

The combined 5 gallons of water are then pumped up to the surface through the delivery pipe. 1 gallon of water would then be delivered to your pressure tank. 

Note: To get 10 gallons of useable water, 40 gallons of water must be recirculated down the drive pipe.

Sizes and Materials 

Venturi adapters are available in two diameter sizes, 1” and 1-1/4”. The 1” size is used on the smaller diameter drive pipe and the 1-1/4” on the larger diameter delivery pipe in your well system. 

Venturi adapters also come in two different lengths, 6" and 10". The two different sizes are to accommodate for different size venturi tubes. It's important to make sure that the end of the venturi tube will not make contact with the venturi adapter when it is threaded into the ejector body. If there is any doubt, select the longer 10” venturi adapter to be safe. The use of a longer venturi adapter won't cause any harm!

Boshart's Venturi Adapters come in three different materials. Zinc plated, bronze, and stainless steel. 

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Zinc Plated:

Zinc plated are the cheapest option out of the three materials. Be aware that with less cost comes less reliability. This material is much more likely to need replacing before its bronze or stainless steel counterparts. 


Bronze is the top of the line. It is the most durable and long lasting out of the three. However, you will pay a pretty penny for this shiny material. 

Stainless Steel:

Our 304 grade stainless steel is the most economical option. It has all of the same features as bronze but it is not as expensive. This makes it the ideal choice for most. 

What is a well seal elbow?




Well Seal Elbows have a 90° long bend "sweep" design that helps to reduce friction loss so that your deep well jet pump will run as efficiently as possible. They are primarily used with polyethylene pipe. 

Well seal elbows are typically used in well pits to make directional changes from the vertical pipes to the horizontal service lines that run to your pump house or residence. They can be used in both shallow well and deep well jet pump applications. 



In conclusion, Venturi Adapters and Well Seal Elbows are a product that you either need or you don't. If you have a deep well jet pump we highly suggest trying out our new stainless steel material as it will save you time and money in the long run. To see our full line up of venturi adapter and well seal elbows, head over to https://boshart.com/search-results/?q=venturi


Have further questions about this subject?

Head over to Boshart's Knowledge Base: technical product information, guidelines, and more.