Water Systems for a Sustainable Future

Watermark Rainwater Harvesting Designs, Installs and Maintains Water Systems

Call Now (408) 690-7581

8 am – 5 pm


    The Watermark H2O team has collectively been in the residential and commercial building industry for well over forty years. We have all seen a need in our industry and have come together to form an alliance to further build on the green sustainable building practices that are so desperately needed in our industries.

    Serving coastal California with Pioneer Water Tanks from the on-site delivery to the accredited installation with a warranty included on the tank as well as the tank liner.


    WaterMark H2O are accredited suppliers of Pioneer Water Tanks, the longest-lasting BPA-free water storage tank on the market. WaterMark H2O provides complete project management including design and installation services.

    Watermark Rainwater Harvesting provided this water system for a private home on the edge of a wildlife preserve. Located near Atascadero, the water system is permitted with the San Luis Obispo County. The XL 13/02 Pioneer Water Tank is used for domestic water storage and fire suppression reserve.

    The fire suppression tank implements a Wharf hydrant with fire connections that connect to the fire sprinkler system in the house. A water well supplies for the water system.

    California water storage tank systems on sale

    Watermark Rainwater Harvesting installed this XL 60/03 Pioneer Water Tanks America system for fire protection and irrigation for a property in Bonny Doon, California. The water system is permitted with the local authority for fire protection with fire connections and steel fittings.

    The system utilizes a commercial level gauge and lockable ladder. The tank has a full capacity of 108,261-Gallons with an overflow that reduces the usable water supply, as required.

    40,000 gallon water storage tanks on sale

    Watermark H2O Rainwater Harvesting designed and installed an XLE 30/02 Pioneer Water Tank for the Lago Giuseppe Winery. This fire protection system includes a fire hose adapter and firefighting nozzles, in case of emergencies.

    The water storage was needed for fire flow and satisfied the County of San Luis Obispo fire protection requirements. The system was installed in March 2016 with a 40,000 gallon effective capacity for fire protection.

    Watermark H2O Rainwater Harvesting designed and installed an XLE 50/03 Pioneer Water Tank for a commercial property. This fire protection system was required by Santa Cruz County for fire flow.

    The commercial fire protection system was installed onsite with a proprietary jacking system. The system was installed in October 2018 with a 100,000-gallon effective capacity for fire protection.

    Dual Use Water Tanks

    Pioneer Water Tanks are approved for use in California for fire protection and drinking water storage. Combining several uses into one dual-use water tank saves money as compared to buying two separate water storage systems. Our standpipe or external fitting options diverts the additional water supply to ensure that it doesn’t affect the required mandated usable water capacity for fire protection. We offer commercial accessory options to comply with local requirements.

    Cost-effective dual purpose tank for multiple water needs

    Complies with NFPA requirements for fire protection water tanks

    NSF-61 Certified AQUALINER® Fresh tank liner keeps water fresh and clean (learn more)


    Pioneer Water Tanks are engineered to NFPA standards for water storage for fire protection. The tank body and roof are made of Zincalume® Steel, which is proven to withstand fire immersion. The tank’s firefighting adapters and nozzles are compatible with fire hoses across North America.


    Pioneer Water Tanks can be configured for cyclonic and seismic conditions, as well as heavy industrial zones. Additional accessories are available for different compliance needs. Outfit your tank with anti-vortex fittings and firefighting adapters for quick access during a fire emergency.

    Tank CodeUS GallonsDiameter

    XLE 10/02

    10,00017′ 7″

    XLE 13/02

    15,00019′ 9″

    XLE 15/02

    20,24322′ 0″

    XLE 23/02

    29,09326′ 4″

    XLE 30/02

    39,62630′ 9″

    XL 40/02

    51,78535′ 2″

    XL 50/02

    65,56739′ 6″

    XL 50/03

    97,14839′ 6″

    Custom Sizes

    CustomDesigned to Project

    Call Now (408) 690-7581

    8 am – 5 pm





      Our exclusively engineered trusses are hot-dipped galvanized steel equipped with a swivel foot. As a result, it provides optimal movement in your tank in extreme conditions. As your tank adapts to external conditions, you can rest easy your tank won’t fail when you need it most.



      Specifically engineered for strength and durability, our bolts are galvanized high tensile 8.8 grade. Not only are they hardened and super strong, but they are also the most resistant bolt on the market to shear under pressure.



      Our exclusive PIONEER V-LOCK® is specifically engineered to maximize the strength of corrugated steel without damaging or stretching your liner when molded to the tank wall. Independent testing proves that the PIONEER V-LOCK® provides the ultimate shock absorption to prevent movement or sinking.



      Be ready for fire emergencies with our fast, convenient firefighting valve options. Outfit your tank with anti-vortex fittings and firefighting adapters for quick access during a fire emergency.


      Only the highest quality Zincalume® and Colorbond® steel are used in Pioneer Water Tanks, providing unmatched durability that no other tank manufacturer can offer- that’s why Pioneer Tanks last longer than any other brand. Pioneer Water Tanks come standard in Zincalume® Steel with your option of upgrading to a wide selection of Colorbond® steel color options.

      Next-generation ZINCALUME® steel AM125 introduces magnesium into the aluminum-zinc alloy coating, which improves galvanic protection by activating the aluminum. The result is more effective corrosion resistance. BlueScope Steel research and testing have found that the addition of 2% magnesium is the optimum level of corrosion performance and coating integrity. Along with a capital investment of over $100 million to facilitate the required manufacturing capability, BlueScope Steel can now produce next-generation ZINCALUME® steel AM125 with even greater durability and a more efficient protective coating mass.

      To ensure the durability and reputation of next-generation ZINCALUME® steel, BlueScope Steel conducted a comprehensive testing program that included a series of accelerated laboratory corrosion tests as well as a strong emphasis on real-world outdoor exposure tests. A thorough and rigorous testing program ensured that the new product provided optimum performance.

      Zincalume vs Galvanized Steel Salt Spray Test
      Pioneer Water Tanks keep water fresh and clean

      Pioneer Water Tanks, AQUALINER® Fresh antimicrobial tank liner is a world’s first to keep your water fresher, for longer.


      For families across the world relying on the quality of tank water for their daily use and consumption, this means for the first time, being able to enjoy the additional peace of mind that comes with fresher, purer and cleaner water, thanks to the use of antimicrobial technology on the inside lining of Pioneer water tanks.


      The AQUALINER® Fresh is manufactured utilizing a patented three-layer process that adheres to a PP Multifilament Base with a Polyethylene Film on the surface.

      • The PP base, PP/PE Coating, and PE Film are all bound together through a process called Extrusion Coating.

      • The PP Multifilament Base provides strength, flexibility, and dimensional stability.

      • The PE Film provides toughness, water-resistance, and heat seal characteristics.

      • Sanitized Technology is inherent in the Black Polyethylene Film that touches the water.

      “The AQUALINER® Fresh tank liner is the culmination of Pioneer’s 30 years’ local and international experience in water storage and a result of our continuous drive to improve the way we store water for the benefit of our customers. Water quality is an important global issue and we know it’s one of the most important factors people consider when buying a water tank” said Daniel Wyatt, General Manager, Pioneer Water Tanks.


      Ensuring the quality of your water is incredibly important!

      Concrete ring beam for Pioneer Water Tanks


      Concrete ring beams are used for commercial and some rural and light industrial water tanks to support the wall and also to hold the tank down during storms and cyclones. Ring beams may also be specified for tanks that are to be constructed on aggressive, acidic soils or where there is a risk of water or wind erosion of the foundation materials.


      Each model of Pioneer Water Tank has an exact cement ring beam dimensions and details that are outlined in our engineering packages. At the time of your order, a specific ring beam drawing will be issued for the project requirements. It’s recommended that there is strict adherence to these specifications for the best performance of the tank.

      Call Now (408) 690-7581

      8 am – 5 pm




        Watermark Rainwater Harvesting

        350 Encinal Street, Santa Cruz, California 95060