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I’m upgrading my pump. Do I need new tubing as well? | Decorative Ponds & Water Gardens Q & A

Q: I’m upgrading my pump. Do I need new tubing as well?

Q: I’m upgrading my pump. Do I need new tubing as well?

Roger – Cordova, TN

A: Congratulations on the purchase of your new toy! To get the maximum flow out of your pump, you’ll need to make sure your tubing size lines up with your flow rate.

Here’s what we recommend:

  • Up to 500 GPH: ½ inch tubing
  • 501 – 900 GPH: ¾ inch tubing
  • 901 – 1,500 GPH: 1 inch tubing
  • 1,501 – 2,700 GPH: 1¼ inch tubing
  • 2,701 – 3,600 GPH: 1½ inch tubing
  • 3,601 – 5,400 GPH: 2 inch tubing
  • 5,401 – 13,500 GPH: 3 inch tubing

When it comes to selecting a type of tubing, you can choose from three different types: flexible PVC tubing, flexible kink-free tubing and flexible black vinyl tubing. Each has its own unique features and uses. Here’s what you need to know:

Flexible PVC Tubing

Ideal for water features, flexible PVC tubing can have water in it year round without damage from freezing temperatures, and the pipes can be buried. To join the lengths of pipe and plumb your pump, you will need to use schedule 40 PVC fittings and PVC glue. Flexible PVC is the most expensive of the bunch, but it’s your best choice for high-flow pumps. It comes in 1½” to 4″ diameter.

Flexible Kink-Free Tubing

The most popular and widely used water feature tubing, flexible kink-free tubing makes plumbing jobs a breeze as it requires few pipe cuts and unions. The heavy-duty tubing can withstand freezing temperatures and being buried. Connect the tubing with barbed and insert fittings and hose clamps rather than messy glue. We have it in ½” to 1½” diameter.

Flexible Black Vinyl Tubing

Ideal for smaller pumps, fountains and statuary, flexible black vinyl tubing is connected with insert fittings and hose clamps. It’s not sturdy enough to withstand being buried or left out in freezing temperatures. We carry 3/8″ to 1″ diameter tubing.

Get the most out of your new pump with the right tubing in the right size. You’ll be glad you did!

Pond Talk: Have you re-plumbed your pump or pond recently? What plumbing tips can you share from your experience?

Make Your Plumbing Job Easy - Flexible Kink-Free Tubing

How Do I Know What Tubing Size to Use? – Water Garden Q & A

Flex PVC Tubing

Q: How do I know what tubing size to use? I want to increase the water to my waterfall from 1,500 gph (gallon per hour) to almost 4,000 gph. I currently have 1″ tubing will this work? – Matt of Vermont

A: No. Your pump and tubing are currently sized correctly, but if you increase the water flow to 4,000 gph you will need to increase the tubing to see the benefits of your new pump. I would guess that you would not see more than 2,000 gph if you leave the 1″ tubing. When using a 4,000 gph pump, the proper tubing size to use would be 2″. A good way to think about tubing size is to imagine drinking from a straw. If you were to try to drink a glass of water with a cocktail straw it would take much longer than if you were to drink that same glass of water from a standard size straw. Over the years we have developed a chart to help our customer’s size their tubing. Please see below. To see our selection of plumbing and accessories, click here.

Up to 500 GPH: Use 1/2″ Tubing
Up to 900 GPH: Use 3/4″ Tubing
Up to 1,500 GPH: Use 1″ Tubing
Up to 2,700 GPH: Use 1-1/4″ Tubing

Up to 3,600 GPH: Use 1-1/2″ Tubing
Up to 5,400 GPH: Use 2″ Tubing
Up to 13,500 GPH: Use 3″ Tubing
Up to 21,000 GPH: Use 4″ Tubing
Up to 42,000 GPH: Use 6″ Tubing

Plumbing Tip: Try to avoid 90 degree turns for this will cause friction slowing down and reducing your water flow. We always recommend flexible PVC to avoid connections that can not only leak but cause friction loss reducing your water flow.

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