Product images and videos are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
AQUA HOT
SYSTEM, 125D MODULAR DIESEL HYDRONI
SKU: A0EC AHM-125-D03-S
Moderate — 2–4 hours
Overview
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Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Fitment
Fitment Guaranteed
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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
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Specifications
| Brand | AQUA HOT |
| Part Number | A0EC AHM-125-D03-S |
Videos
Aqua-Hot Gen1 Installation Video with Sarah Yak
How to build a Hydronic Diesel Heating System in a van conversion
Hydronic vs Air Heater | Which is the Best Van Heating Option
This RV System Is the Best And Worst To Have At The Same Time - (Hydronic Heat)
Troubleshooting & Fixing the Aqua Hot in Our RV
AQUA HOT ... AQUA HOT SERVICE ... BLACK SOOT RV REPAIR (RV USA TOUR)
Why DIY Hydronic Heating Systems Fail (I've Made Almost Every Mistake)
About MOTORMIA
Buy with Confidence
Returns & Fitment
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.
Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.
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