Kuhlmann

Kuhlmann tanks are manufactured from GRP (glass-reinforced plastic), giving a rigid, corrosion-resistant structure that's stronger than standard polyethylene for larger capacities. Because they're built in sections or as a single moulded shell, larger models may need a crane or specialist plant for lifting into position. Always check access widths and ground-bearing capacity at your site before ordering.

Yes, many Kuhlmann tanks are designed for underground burial and come with the necessary structural strength to withstand ground and groundwater pressure when installed correctly. You'll need a properly engineered concrete base or surround as specified in the installation guide, plus adequate backfill to prevent flotation. Above-ground versions use the same GRP construction but don't require the same groundworks.

Sizing depends on roof catchment area, local rainfall and intended use — a typical household using harvested water for WCs and outdoor taps often needs somewhere between 2,500 and 5,000 litres. Larger properties or those irrigating gardens may need more capacity to bridge dry spells. We'd recommend calculating your daily demand and average rainfall yield before choosing a model.

Kuhlmann's potable-grade tanks are manufactured to meet WRAS requirements, meaning the materials in contact with water won't taint or contaminate a wholesome water supply. Always check the specific product listing to confirm whether the tank you're looking at is WRAS-approved, as non-potable variants in the same range are not suitable for drinking water storage. Fittings and pipework connected to a potable tank should also be WRAS-approved to maintain compliance.

Larger Kuhlmann tanks are bulky items delivered on flatbed or crane-offload vehicles, so you'll need clear, level access for the lorry and enough space to manoeuvre or lift the tank into place. It's worth confirming gate widths, overhead cables and ground conditions ahead of the delivery date to avoid delays. If you can't take a crane-offload delivery, let us know so we can advise on alternative handling options.

Yes, the range includes larger-capacity tanks built for commercial, agricultural and industrial water storage, from irrigation reservoirs to firewater and process water applications. GRP construction copes well with the demands of continuous outdoor use and larger volumes compared with standard polyethylene tanks. For firefighting water storage or specific regulatory requirements, check the tank's certification matches your intended use before ordering.