Custom Rainwater Harvesting Water Tanks

We make more than what’s on the price sheet!

Hardly a week goes by when we don’t get a request for rainwater collection tanks that are not on our price sheet. The fact is, we can actually do a lot more! In fact, many custom rainwater catchment tanks don’t take too much more work to design and fabricate. If there’s a product or size that you don’t see, just ask us, and we might be able to make it happen!

What We Can Make

Tanks can be made from 3’ in diameter to 8.5’ in diameter and up to 11’ 4” tall. Anything larger requires a special permit to transport.

We can also create custom well covers. A well cover is a tank without a bottom and is not sealed or painted. A 3’ door may be added.

Note: At this time we do not recommend tanks be used as swimming pools. Too many sharp edges!

When to Choose a Custom Rainwater Tank

A standard tank works well for many rainwater systems, but some properties need a more specific fit. Custom rainwater harvesting water tanks can be helpful when your available space, roofline, tank placement, or water-use goals do not match a standard size on the price sheet.

Texas Metal Tanks can build custom and specialty tanks in a range of diameters and heights, so it is worth asking if you do not see the exact size you need.

Custom Rainwater Tank Options to Discuss

Here’s what to think about before you reach out to request a custom quote:

• Desired capacity or available footprint
• Diameter and height limits
• Galvanized or stainless steel construction
• Inlet location and size
• Outlet size for hose, gravity-fed use, or future pump setup
• Overflow placement and drainage direction
• Delivery, pickup, or installation needs

Planning the Right Rainwater Catchment Tank Size

Tank size depends on how much roof area feeds the system. You should also consider how you plan to use the water, and how much space you have for the tank itself.

As a rule of thumb, 1 inch of rain on 1,000 square feet of roof area can produce about 600 gallons of water. We recommend planning around a 2” to 3” rain event.

For most custom rainwater tanks, the right choice comes down to balancing capacity with available space, downspout placement, and delivery access. If you’re not sure, reach out, and we’ll explore options together.

FAQs About Custom Rainwater Harvesting Water Tanks

Can Texas Metal Tanks build custom rainwater harvesting water tanks?

Yes. Texas Metal Tanks makes more than what is shown on the standard price sheet, including custom rainwater harvesting water tanks for projects that need a different size, shape, or setup. If you do not see the tank you need, send us the details and we can let you know what is possible.

What size custom rainwater tanks can you make?

Custom rainwater tanks can be made from 3’ to 8.5’ in diameter and up to 11’4” tall. Anything larger may require a special permit to transport, so it is helpful to tell us early if your project needs a larger or unusual tank size.

How do I know what size rainwater catchment tank I need?

The right rainwater catchment tank depends on your roof area, available space, and how you plan to use the water. As a general rule, 1 inch of rain on 1,000 square feet of roof can produce about 600 gallons of water. We usually recommend planning your system around a 2” to 3” rain event.

What should I include when requesting a custom rainwater collection tank quote?

Send us as much practical information as you can. Useful details include your desired capacity, available space, tank location, delivery needs, and whether you plan to pick up the tank, have it delivered, or ask about installation. Photos, measurements, and notes about fences, gates, eaves, trees, or tight access can also help.

Can custom rainwater collection tanks be delivered?

Yes. Texas Metal Tanks can deliver tanks within 250 miles of Dripping Springs on our trailer, and we can also arrange shipping for customers farther away. Delivery costs depend on distance, quantity, and tank size. For larger tanks, make sure the delivery path is clear and the tank location is ready before delivery.

Can I pick up my custom rainwater tank?

Yes, pickup is available from our factory in Dripping Springs, TX. Pickup times need to be scheduled in advance. Please make sure your truck or trailer can safely carry the tank size you order, and bring enough straps for both the tank and the top.

Request a Custom Quote