Can I Install the Seaflo Accumulator Tank with my Water Hater?
Updated 10/13/2026 | Published 10/09/2026
Question:
Can the seaflo water accumulator be installed on the hot out side of the Gerard continuous hot water heater? The purpose would be to mix hot and cold water at the hot water start to minimize the cold water slug coming into the line after turning the hot water off then on again.
asked by: Keith Z
Expert Reply:
Hey Keith!
Thanks for reaching out again!
The Seaflo Accumulator Tank # SE38FR can help stabilize water pressure and reduce temperature fluctuations with tankless water heaters, but I wouldn't recommend installing it directly on the hot water outlet of your Girard water heater.
The accumulator works by storing a small amount of pressurized water and releasing it as needed to maintain a steadier flow. It doesn't actually circulate water back through the heater or keep the water in your lines hot, so it wouldn't necessarily eliminate that cold-water slug you're experiencing.
What you're describing is a pretty common issue with tankless water heaters. When you turn the hot water off, the heater stops heating, and when you turn it back on, there's a short delay before it starts producing hot water again. An accumulator installed on the cold-water supply side may help smooth out pressure fluctuations, but it won't eliminate that heating delay.
Will this be going in the 2019 Renegade Vienna we talked about last time, and do you happen to know which Girard water heater model you have? I'd like to look into the specific setup to see what options might help with that temperature drop.
Product Page this Question was Asked From
Seaflo Accumulator Tank for RV and Boat Water Pumps - 0.75 Liter
- RV Water Pump
- Accumulator Tank
- 10 psi
- Seaflo
more information >
Continue Researching
- Q&A: Recommended Replacement for a Shurflo 4900-0201 Water Pump
- Q&A: I Just Replaced My SEAFLO Pump So Do I Need to Recheck the Accumulator Pressure?
- Q&A: Trailer Hub and Drum Assembly for a 2024 Grand Design Imagine 2600RB with Lippert ABS
- Q&A: Can Blue Ox Weight Distribution Shank Be Used in Rise Position?
- Q&A: Best Weight Distribution with Sway Control for 2025 Brinkley Z Air 297
- Q&A: Replacement Brake Assemblies for Lippert ABS Hubs
- Q&A: Replacement RV Toilet for Keystone Montana to Replace Dometic 310
- Article: What are the Common Types of Propane Fittings Used on RVs?
- Article: Does Solar Panel Type Really Matter?
- Article: Trailer Wiring Diagrams
- Article: Which RV Propane Tank Size Do I Need?
- Article: How Does an RV Water Pump Work?
- Article: Rooftop Cargo Carriers
- Article: How (and Where) to Connect an RV Propane Grill
Jeff
10/13/2026
I would recommend installation on cold water side to control pressure fluctuations. I think you would have. Better control and a longer equipment life that way.