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Filament Wound Fiberglass Tanks

CSA/NSF 61 certified

At Canwest Tanks & Ecological Systems Ltd, we make fiberglass tanks from 500 imp. gals to 34,000 imp. gals. Fiberglass tanks can be for potable or non-potable water, septic tanks, holding tanks and pump stations - vertical or horizontal applications.

Larger volume tanks are made from filament wound fiberglass, this production method allows us to accommodate specific volumes in 3', 4', 5', 6', 7', 8', or 10' diameter tanks.

Potable water tanks are made with specific resins conforming to ANSI/NSF61 certification for use in food grade applications.


Tanks are designed for underground burial with the standard tank capable of 4 ft. of earth cover. By special order the tanks can be buried up to 8 ft. of earth cover or more.


Installation instructions are included with each tank and fiberglass hold-down straps are available for anchoring to ballast in high water table conditions.


Read the warranty information for fiberglass tanks manufactured by Canwest Tanks.


Read about the installation of fiberglass tanks manufactured by Canwest Tanks.


Above Ground Models

Fiberglass (FRP) tanks for burial and above ground application

The models listed are typical tank sizes, tanks can be made to any volume required.


6ft. Diameter Tanks (H) horizontal (V) vertical

To compute the approx. length of a 6' dia. Tank use this formula:

(Volume /176)+1 = Length of tank in feet, e.g. (5000/ 176)+1 = 29.4'

Model# 1 Gal. US Gal. Litres Dia " Length"
FRP2000-6H (V) 2000 2400 9092 72 144
FRP3000-6H (V) 3000 3600 13638 72 216
FRP4000-6H (V) 4000 4800 18184 72 276
FRP5000-6H (V) 5000 6000 22730 72 352
FRP6000-6H (V) 6000 7200 27276 72 420
FRP7000-6H (V) 7000 8400 31822 72 492
FRP8000-6H (V) 8000 9600 36368 72 552
FRP9000-6H (V) 9000 10800 40914 72 624

8ft. Diameter Tanks (H) horizontal (V) vertical

To compute the approx. length of a 8' dia. Tank use this formula:

(Volume /313)+1 = Length of tank in feet, e.g. (5000/ 313)+1 = 17'

Model# 1 Gal. US Gal. Litres Dia " Length"
FRP5000-8H (V) 5000 6000 22730 96 204
FRP6000-8H (V) 6000 7200 27276 96 242
FRP7000-8H (V) 7000 8400 31822 96 280
FRP8000-8H (V) 8000 9600 36368 96 319
FRP9000-8H (V) 9000 10800 40914 96 357
FRP10000-8H (V) 10000 12000 45560 96 395
FRP12000-8H (V) 12000 14400 54552 96 472
FRP15000-8H (V) 15000 18000 68190 96 588

10 ft. Diameter Tanks (H) horizontal (V) vertical

To compute the approx. length of a 10' dia. Tank use this formula:

(Volume /490)+1 = Length of tank in feet, e.g. (7000/ 490)+1 = 15.2'

Model# 1 Gal. US Gal. Litres Dia " Length"
FRP7000-10H(V) 7000 8400 31822 120 184
FRP8000-10H(V) 8000 9600 36368 120 208
FRP9000-10H(V) 9000 10800 40914 120 233
FRP10000-10H(V) 10000 12000 45560 120 257
FRP12000-10H(V) 12000 14400 54552 120 306
FRP14000-10H(V) 14000 16800 67936 120 343
FRP16000-10H(V) 16000 18000 68190 120 379
FRP18000-10H(V) 18000 21600 81828 120 440.8
FRP20000-10H(V) 20000 24000 90920 120 502
FRP22000-10H(V) 22000 26400 100012 120 538.7
FRP24000-10H(V) 24000 28800 109104 120 587.8
FRP26000-10H(V) 26000 31200 118196 120 649
FRP28000-10H(V) 28000 33600 127288 120 696
FRP30000-10H(V) 30000 36000 136380 120 747
FRP32000-10H(V) 32000 38400 145472 120 792
FRP34000-10H(V) 34000 40800 154564 120 845

Below Ground Models

Canwest carries a large variety of below ground tank models including:


Water tanks

The water tanks are made with special resins having ANSI/NSF61 Certification for potable water. Tanks are built to conform to CSA Standard B66 for underground tanks.


Septic tanks

Canwest Tanks has a complete line of septic tanks - septic related tanks and accessories, made from high density linear polyethylene (HDPLE) and fiberglass reinforced plastic (FRP) in sizes approved for single and multi-family homes, seasonal camps, work camps, RV parks, and industrial applications.


We can supply the tanks, distribution box, leaching chambers - etc. All you will need to complete your septic system, from the house to the field.


• Single compartment

• Dual compartments

• Septic tank and pump chamber in one tank

• Septic tank and siphon chamber in one tank

• Sewage aerated holding tank


We can install the pumps into the pump chamber, c/w float switches, and visual/audible alarm panel.

You provide the particulars of your project, and we will do the math.


Sewage aerated tanks

The sewage aerated tank (SAT) is, as the name indicates, a holding tank for sewage. However, unlike a regular holding tank, this tank is being aerated through air diffusers installed in the tank and an air blower, usually outside the tank, provides the airflow into the tank. A control panel must be installed to indicate the levels as the tank is filled up, and a light to indicate that it is time to have the tank pumped out.


This panel also has a high level warning with audible and visual alarm. The reasons for aeration is that by infusing air (oxygen) into the liquid it lowers the biochemical oxygen demand (BOD) which is the amount of oxygen required to break down the nutrients in the waste water. The oxygen also prevents the sewage from going septic (decompose) and therefore no noxious gasses or odors are produced. Aeration, to a certain degree keeps the sludge from settling.


Water/oil separator tanks

We make our gravity flow water/oil separator tanks from fiberglass, a durable and noncorrosive material that will not be affected by most chemicals.


A water/oil separator tank is made with an internal baffle, creating two chambers. It retains the incoming oil and grease, bearing liquid in the first chamber, allowing the oil and grease to rise to the top of the tank, where it will be removed with intervals. The clean water will then flow through an opening at the bottom of the baffle into the second chamber and be discharged.


The tanks can be made in volumes to suit your project.


5 ft. Diameter Underground Fiberglass Tanks

Model# Imp. Gal. Length"
FRP3000-5H 3000 296
FRP4000-5H 4000 395
FRP5000-5H 5000 493
FRP6000-5H 6000 592

6 ft. Diameter Underground Fiberglass Tanks

Model# Imp. Gal. Length"
FRP3000-6H 3000 216
FRP4000-6H 4000 276
FRP5000-6H 5000 348
FRP6000-6H 6000 420
FRP7000-6H 7000 492
FRP8000-6H 8000 552
FRP9000-6H 9000 624

7 ft. Diameter Underground Fiberglass Tanks

Model# Imp. Gal. Length"
FRP4000-7H 4000 204
FRP5000-7H 5000 264
FRP6000-7H 6000 324
FRP7000-7H 7000 384
FRP8000-7H 8000 444
FRP9000-7H 9000 504
FRP10000-7H 10000 564

8 ft. Diameter Underground Fiberglass Tanks

Model# Imp. Gal. Length"
FRP5000-8H 5000 204
FRP6000-8H 6000 264
FRP7000-8H 7000 312
FRP8000-8H 8000 360
FRP9000-8H 9000 408
FRP10000-8H 10000 456
FRP12000-8H 12000 552
FRP15000-8H 15000 588

10 ft. Diameter Underground Fiberglass Tanks

Model# Imp. Gal. Length"
FRP7000-10H 7000 186
FRP8000-10H 8000 210
FRP9000-10H 9000 234
FRP10000-10H 10000 252
FRP11000-10H 11000 280.8
FRP12000-10H 12000 306
FRP13000-10H 13000 330
FRP14000-10H 14000 355.2
FRP15000-10H 15000 379.2
FRP16000-10H 16000 404.4
FRP18000-10H 18000 452.4
FRP20000-10H 20000 501.6
FRP22000-10H 22000 550.8
FRP26000-10H 26000 655.2
FRP30000-10H 30000 746.4
FRP34000-10H 34000 856.8

Canwest Tanks Packaged FRP Lift Stations

When your project requires a water or sewage lift station, you can order Canwest Tanks fiberglass lift stations with confidence. Canwest Tanks has provided large flow lift stations to both commercial and municipal projects and has established a reputation in the industry for providing superior quality in products, services, and support.


Each lift station is designed and manufactured under a stringent quality program to meet the needs of your specific application. They can be equipped with single or duplex pumps, lift-out rail systems, and in case of larger lift stations, ladders and grating for internal maintenance.


Contact us with your needs, and we will provide you with a quote.


We make lift station in these diameters:

4 ft. ø , 5 ft. ø,

6 ft. ø, 7 ft. ø,

8 ft. ø and 10 ft. ø

The height = as tall as the project requires.


Take a look at further details for our commercial and residential lift stations.

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