WATTS GIDDS-1030402 Water Gallon Expansion Tank 4.5 PLT-12

( Brand: Watts ), ( Manufacturer Part Number: GIDDS-1030402 ), ( Part Type: Water Expansion Tank )

Review WATTS Water Tech 4.5 Gallon Potable Expansion Tank

The Watts Gidds-1030402 Water 4.5 Gallon Expansion Tank, model number PLT-12, is a high-performance, reliable solution for managing the pressure fluctuations in your hydronic heating system. This expansion tank, manufactured by Watts Water Technologies, is designed to provide additional volume to accommodate the water expansion that occurs during heating.

The tank has a capacity of 4.5 gallons (17.04 liters) and is engineered with a durable, corrosion-resistant polypropylene construction. Its oval shape allows for efficient use of space, making it an ideal choice for installations where space is at a premium. The PLT-12 expansion tank features a transparent sight glass, which allows for easy monitoring of the antifreeze solution level within the tank.

This Watts Water expansion tank is designed for use with heating systems that operate under a maximum working pressure of 15 psi (103 kPa) and a maximum temperature of 257 F (125 C). It comes with a factory-installed, pre-charged air compressor, which ensures the tank is properly pressurized upon installation. The air compressor is designed to be maintenance-free, eliminating the need for regular refilling or recharging.

The PLT-12 expansion tank is also equipped with a built-in pressure relief valve, which protects against excessive pressure buildup within the system. This safety feature helps prevent damage to the heating system components and ensures the long-term reliability and efficiency of your hydronic heating system.

Installation of the Watts Gidds-1030402 Water 4.5 Gallon Expansion Tank is straightforward. It can be installed horizontally or vertically, making it a versatile option for various system configurations. The tank comes with a factory-installed threaded inlet and outlet connections, making it compatible with standard 1/2" NPT threads. Additionally, the tank includes a threaded air vent connection, which is used for purging air from the system during installation.

In summary, the Watts Gidds-1030402 Water 4.5 Gallon Expansion Tank (PLT-12) is a high-quality, durable, and easy-to-install solution for managing pressure fluctuations in your hydronic heating system. Its corrosion-resistant construction, transparent sight glass, factory-installed air compressor, and built-in pressure relief valve make it a reliable and efficient choice for maintaining the performance and longevity of your heating system.

Pros and Cons of Buying Watts Gidds-1030402 Water 4.5 Gallon Expansion Tank (PLT-12)

a. High-quality construction: The Watts Gidds-1030402 Water Expansion Tank is made of heavy-duty materials, ensuring durability and long-lasting performance.

b. Large capacity: This expansion tank has a capacity of 4.5 gallons, making it suitable for larger heating systems.

c. Pressure relief valve: The tank comes with a built-in pressure relief valve, which helps maintain the proper pressure level in the system and prevents damage due to pressure fluctuations.

d. Easy installation: The expansion tank features a convenient side inlet and outlet connection, making it simple to install.

a. Price: Compared to smaller expansion tanks, the Watts Gidds-1030402 Water Expansion Tank (PLT-12) is more expensive due to its larger capacity and superior construction.

b. Size: The tank's larger size may require more installation space than smaller expansion tanks.

The Watts Gidds-1030402 Water 4.5 Gallon Expansion Tank (PLT-12) offers several advantages, including high-quality construction, large capacity, built-in pressure relief valve, and easy installation. However, its larger size and higher price point are potential drawbacks.

If you have a larger heating system and are looking for an expansion tank with superior durability and a larger capacity, the Watts Gidds-1030402 Water Expansion Tank (PLT-12) is an excellent choice. However, if you have a smaller heating system or are on a tight budget, you may want to consider a smaller and more affordable expansion tank.

Based on the information provided, if you have a larger heating system and require a high-quality, durable expansion tank with a large capacity, the Watts Gidds-1030402 Water 4.5 Gallon Expansion Tank (PLT-12) is a strong recommendation. However, if you have a smaller heating system or are on a tight budget, consider a smaller and more affordable expansion tank that better suits your needs.

Details:

New in box see photos.

part #: gidds1030402 prices

• $48.00-$159.95

specifications wateheat:

• brand: Watts
• mpn: Gidds-1030402
• part type: Water Expansion Tank

shipping wateheat:

• cost: $14.95
• service: USPS Ground Advantage
• class: Standard
• transit: 6-9 Days
• carrier: USPS
• type: Fixed

returns wateheat:

• policy: No Returns

seller wateheat:

• # reviews: 4383
• city: Roanoke, Virginia
• rating: 98.7%

payments wateheat:

• wallet: Google-pay
• credit card: Discover
• other

general wateheat:

• Heating, Cooling Air > Water Heaters > Water Heater Parts
• condition: Open box

offer wateheat:

• quantity: 1
• options: Ship-to-home
• started: March 24, 2026
• best offers: True
• availability: In Stock
• sold: 0

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