E-11 & A-38 Standards
In this course
4 sections, plus a graded quiz. Click any to jump to it.
Introduction
Insurance, resale, and charter compliance all hinge on ABYC documentation. This chapter maps ABYC E-11 (HVAC) and A-38 (plumbing) to the Dometic and SpotZero systems you will be working on. A system that does not meet the standard will not pass inspection, and it is a liability for the owner.
Why it matters: the ABYC standards are not abstract — they map directly to the systems you service. This is the skill that separates a tech who services a system from a tech who certifies one.
ABYC E-11: HVAC requirements
ABYC E-11 covers the installation of compressors, condensers, evaporators, and controls. The key requirements:
- The compressor must be protected from liquid slugging.
- The condenser must have adequate ventilation.
- The refrigerant lines must be properly supported and insulated.
- The electrical connections must be rated for the compressor's starting current.
E-11 is not a suggestion — it is the standard that insurers and charter operators use to verify that a vessel's HVAC system is installed to code.
ABYC A-38: plumbing requirements
ABYC A-38 covers the installation of water makers, freshwater systems, and the raw-water loop. The key requirements for a water maker:
- The system must be installed with a seacock, a strainer, and an overboard discharge.
- The fresh water tank must be properly sized and vented.
- The UV sterilizer must be installed downstream of the membrane.
A-38 also covers the raw-water loop: the seacock must be accessible, the strainer must be serviceable, and the overboard discharge must be properly located.
Mapped to Dometic and SpotZero
A Dometic DW Series installation must meet E-11 for the HVAC side and A-38 for the plumbing side. A SpotZero installation must meet the same standards, but the modular configuration means the requirements are distributed across more components.
When you inspect a vessel, you are not just checking the system — you are verifying that the installation meets the ABYC standard.
Remember this line: the standard is the deliverable. A system that meets E-11 and A-38 is a
system that passes inspection, and it is a system the owner can insure and resell.
Your progress
Knowledge check
3 questions · Graded on submission · Pass at 80%
Your attempt, best score, and certification status are saved to your student record.
Ready to go deeper?
Enroll in the full ABYC Prep track or grab the all-in-one package — pricing is shared when you enroll.