# Thermal / hot water heater expansion tanks prevent hot water from back flowing into cold water line or from escaping through the pressure relief valve and onto the floor. Prevents constant fluctuations in water pressure that damage the heater and associated piping. National plumbing code mandates installation when a backflow preventer is present.

**Manufacturer:** Water Worker  
**MPN:** `G12L`

## Specifications

| Attribute | Value |
| --- | --- |
| Brand name | Water Worker |
| Manufacturer name | Water Worker |
| Manufacturer | Water Worker, AMTROL INC, Water Worker/Amtrol, Waterworker |
| Part Number | G12L |
| ASIN | B000H5S8BQ |
| AdultProduct | False |
| Amount | 69.99 |
| Asin | B000BQN82K, B000DZDQJY, B000H5S8BQ |
| Autographed | False |
| Batteries_required | False |
| Binding | Tools & Home Improvement |
| Brand | Water Worker, Water Worker/Clayton Mark |
| Bullet_point | Thermal Expansion Tank With Male Pipe Thread |
| Capacity | 4.4 |
| Case | 1 |
| Cat | Tools & Home Improvement |
| CatId | 228013 |
| CatTree | 13749581, 228013, 3227006011, 468240 |
| CatalogNumberList | 406139 |
| Chemical_names | lead |
| ClassificationId | 3754161 |
| Color | Green |
| Compliance_type | chemical |
| Currency | USD |
| CurrencyCode | USD |
| DisplayName | Kitchen & Bath Fixtures |
| EAN | 815900144 |
| EANList | 815900144 |
| Feature | Safety Tanks are installed with a solid bronze saddle on the cold side of the water heater, Thermal Expansion Tank With Male Pipe Thread |
| Height | 12.0, 12.00, 1280, 16.75, 500, 75 |
| Identifier | 0000815900144, 000815900144 |
| IdentifierType | EAN, UPC |
| ItemClassification | BASE_PRODUCT |
| ItemName | Expansion Tank 4.4gal |
| Item_display_weight | 9.0 |
| Item_name | Expansion Tank 4.4gal |
| Item_package_quantity | 1 |
| Item_package_weight | 9.0 |
| Item_type_keyword | plumbing-equipment |
| Item_weight | 9.0 |
| Keyword | G12L |
| Label | Water Worker/Amtrol, Waterworker |
| Length | 11.25, 17.0, 17.00 |
| Link | https://m.media-amazon.com/images/I/41kVa5XI-KL._SL75_.jpg, https://m.media-amazon.com/images/I/41kVa5XI-KL.jpg, https://m.media-amazon.com/images/I/61HYpJ8B+tL.jpg, https://www.amazon.com/gp/bestsell |
| List_price | 59.99 |
| MPN | G12L |
| Man | Water Worker, Water Worker/Amtrol, Waterworker |
| Material | Alloy Steel |
| Memorabilia | False |
| Model | G-12L, G12L |
| ModelNumber | G12L |
| Model_number | G12L |
| NumberOfItems | 1 |
| Number_of_items | 1 |
| PackageQuantity | 1 |
| PartNumber | G12L |
| Part_number | G12L |
| ProductCategoryId | 3754161, home_improvement_display_on_website |
| ProductGroup | Home Improvement |
| ProductType | WATER_HEATER |

## Distributor availability

| Distributor | SKU | Price (USD) | Qty | Stock | MOQ |
| --- | --- | --- | --- | --- | --- |
| Home Depot | 203269515 | 57.73 | 1 | None | None |
| Do It Best | 406139 |  |  | None | 1 |
| Jugenheimer | JI406139 | 89.99 | 1 | None | 1 |
| Hardware and Tools | ULGB-5310 | 139.09 | 1 | None | 1 |
| Life and Home | 40641086 | 112.54 | 1 | None | 1 |
| Zoro | G600001114 |  |  | None | 1 |
| simsupply.com | 406139 | 81.84 | 1 | 27 | 1 |
| National Supply Network | 406139 | 88.57 | 1 | None | 1 |
| Toolbox Supply | 10890028 | 113.31 | 1 | None | 1 |
| hatchethardware.com | 40641086 | 59.99 | 1 | None | 1 |
| hardwareandmoreee.com | 140865 | 98.46 | 1 | 6 | 1 |
| Zoro | G310089266 | 184.99 | 1 | None | 1 |
| Ace Hardware | 4034971 | 89.99 | 1 | None | 1 |

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Structured data: `/python/html6/product/500/101000000/101493500/part_--G12L---WaterWorker--e9439db8f0.json`  
Search API: https://www.dataalchemy.com/api/  
MCP server: https://www.dataalchemy.com/mcp