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Watts ETX-90 15-Gallon Non- Potable Expansion Tank
18th Jul 2026, 08:12 PM

Watts ETX-90 15-Gallon Non- Potable Expansion Tank for Closed-Loop Systems

Price may vary by location, shipping cost, and availability.
28% Off
$149.99
$208.59

Buy @ amazon.com
Highest: $467.86
Average: $217.90
Lowest: $70.00

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Based our analysis and observation, there is 76.00% chance that the price of Watts ETX-90 15-Gallon Non- Potable Expansion Tank... will decrease. Price of product might fluctuate between 83% and 87% of current price.*

Price History Graph

Offer Price Prices
Lowest: -
Average: -
Highest: -

Price History Information

You can check the price history of Watts ETX-90 15-Gallon Non- Potable Expansion Tank for Closed-Loop Systems here. This product's current Price in USA is $149.99. The average and highest prices are $217.90 and $467.86 respectively.

Lowest Ever Price $70.00
22nd Apr 2026
Average Price $217.90
Based on 3224 days price tracking
Highest Price $467.86
16th Jun 2024

Current Price in USA

Price $149.99
MRP $208.59
Savings $58.60
Discount 28.09%

Recent Price Drops on Watts ETX-90 15-Gallon Non- Potable Expansion Tank for Closed-Loop Systems

Price Drop 21st Apr 2026
$90.00 → $70.00
22.22% drop
Price Drop 11th Apr 2026
$100.00 → $90.00
10% drop
Price Drop 30th Mar 2026
$110.00 → $100.00
9.09% drop
Price Drop 10th Mar 2026
$235.41 → $110.00
53.27% drop
Price Drop 22nd Feb 2026
$258.22 → $235.41
8.83% drop
Price Drop 8th Dec 2025
$383.46 → $215.89
43.7% drop
Price Drop 22nd Nov 2025
$383.46 → $302.59
21.09% drop
Price Drop 15th Nov 2025
$303.14 → $225.75
25.53% drop
Price Drop 13th Sep 2025
$225.75 → $146.60
35.06% drop
Price Drop 4th Aug 2025
$198.66 → $183.45
7.66% drop
Price Drop 31st Jul 2025
$210.17 → $198.66
5.48% drop
Price Drop 28th Jul 2025
$225.75 → $210.17
6.9% drop
Price Drop 30th Jun 2025
$225.75 → $212.20
6% drop
Price Drop 23rd Jun 2025
$225.75 → $207.69
8% drop
Price Drop 18th Jun 2025
$225.75 → $129.00
42.86% drop
Price Drop 10th Jun 2025
$225.75 → $129.00
42.86% drop
Price Drop 16th Apr 2025
$139.00 → $129.00
7.19% drop
Price Drop 22nd Feb 2025
$159.00 → $139.00
12.58% drop
Price Drop 20th Feb 2025
$169.00 → $159.00
5.92% drop
Price Drop 31st Jan 2025
$189.99 → $169.00
11.05% drop
Price Drop 22nd Nov 2024
$215.75 → $189.99
11.94% drop
Price Drop 25th Oct 2024
$294.75 → $225.75
23.41% drop
Price Drop 16th Oct 2024
$264.13 → $245.95
6.88% drop
Price Drop 20th Aug 2024
$294.75 → $265.63
9.88% drop
Price Drop 10th Aug 2024
$458.80 → $294.75
35.76% drop
Price Drop 27th Apr 2024
$273.46 → $245.95
10.06% drop
Price Drop 17th Jan 2024
$277.20 → $245.95
11.27% drop
Price Drop 9th Nov 2023
$277.20 → $210.71
23.99% drop

Product Information

Details

Product Name Watts ETX-90 15-Gallon Non- Potable Expansion Tank for Closed-Loop Systems
Store Product Code B002077ZJA
Store Name amazon.com
Brand Watts
Rating 9.2 / 10
Category Water Heaters
Product Manufacturer Watts
Model Number 66608
Model Number 66608
Color Gray
Dimensions 15.5 x 15.5 x 15.5 inches

Features

  • This non-potable water expansion tank is for closed loop hydronic heating system piping to control the thermal expansion of hot water and maintain system pressure below the relief sett of the relief valve
  • The carbon steel tank is pre-charged at 12 psi, has a 15 gallon volume, and features a durable expansion membrane preventing minimizes loss of the air change and ensures long and trouble-free life for the system
  • Made of carbon steel with epoxy finish, mounts to supply piping, with 3/4 inch MNPT system connection and .302-32 inch charging valve connection for on-site charging of the tank
  • Maximum pressure 75 psi and can be used in residential or commercial hydronic heating systems
  • Use in tandem with your hot water heater to absorb increased water volume ensuring long and trouble-free life for the system

Images

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Image of Watts ETX-90 15-Gallon Non- Potable Expansion Tank for Closed-Loop Systems

Rating and Reviews

9.2 Based on 616 reviews

Watts ETX-90 15-Gallon Non- Potable Expansion Tank has 9.2 rating out of 10. This average rating is consist of 616 individual ratings. You can rate this product at product review page.

* Predictions is created on based of past prices and trends, it does not guarantee that it will happen. These are just prediction for theoretical information only.
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