Lousy house pressure, if I connect outlet of garden faucet to inlet of this pump will I get better outlet pressure to drive an impact type sprinkler?

No it will not do anything for you... This is also 12V not 110 so maybe you should look into your houses old plumbing or contact city about your low water pressure

Yes it has a pressure switch that shuts it off when you shut the flow of water off

What is the power usage for this motor? Amp hours would be best, but pretty much any measure would be helpful.

This is a 12V DC water pressure pump. The max amperage draw is 7.5 Amps. All technical specifications on the pump can be found here: http://seaflo.com/en-us/product/detail/609.html

What is the wattage need when using a power supply

On the placard for the product that I bought, as well as in the product specs, the amperage is listed as 3.5A, with a maximum of 7.5A(presumably when the pump starts). Ohm’s law states that P=VI, so this yields an average of 12V*3.5A = 42W with a worst case of 12V*7.5A=90W.

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SEAFLO 42 Series 12V RV Water Pump, 3.0 GPM 55 PSI, 4-Year Warranty, On-Demand Fresh Water Pressure Pump with Bypass, Self-Priming for RVs, Boats, Marine & Off-Grid Use, UL Listed

SEAFLO 42 Series 12V RV Water Pump, 3.0 GPM 55 PSI, 4-Year Warranty, On-Demand Fresh Water Pressure Pump with Bypass, Self-Priming for RVs, Boats, Marine & Off-Grid Use, UL Listed

Product ID: 26770777

Details

Brand
SEAFLO
Color
Orange
Item Weight
4.8 pounds
Maximum Flow Rate
3 gpm
Maximum Lifting Height
6 feet
Power Source
DC

⚡12V DC power for versatile off-grid use

💧3.0 GPM steady flow rate

🔧4-year industry-leading warranty

$167.82

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Description

🚐💧 Power your adventures with pressure and peace of mind!

BUILT TO LAST BACKED - 4-year limited warranty ensures long-term durability and peace of mind in rugged environments.
WHISPER QUIET OPERATION - Internal bypass and vibration-dampening base minimize noise for a peaceful, premium experience.
PLUG PLAY INSTALLATION - Standard 1/2"-14 MNPT ports and mounting pattern make setup seamless in RVs, boats, and tiny homes.
RELIABLE ON DEMAND PRESSURE - Delivers a consistent 55 PSI for smooth, uninterrupted water flow wherever you roam.
SELF PRIMING RUN DRY SAFE - Self-primes up to 6 ft and protects itself during dry runs—perfect for unpredictable water sources.

The SEAFLO 42 Series 12V RV Water Pump offers a robust 3.0 GPM flow at 55 PSI, engineered for continuous-duty performance in marine, RV, and off-grid water systems. Featuring self-priming capability up to 6 feet, run-dry protection, and an internal bypass for smooth, quiet operation, it’s UL listed and NSF certified for potable water. Backed by a 4-year warranty, this pump combines durability, easy installation, and reliable pressure delivery to keep your fresh water flowing wherever life takes you.

Specifications

ASIN	B01CQ7DD0S
Best Sellers Rank	#5,201 in Automotive ( See Top 100 in Automotive ) #3 in RV Water Pumps & Accessories
Brand Name	SEAFLO
Color	Orange
Customer Reviews	4.4 4.4 out of 5 stars (2,275)
Flow Rate	3 gpm
Included Components	51S01 Filter, 51F01 Fitting
Item Dimensions L x W x H	7.96"L x 4.92"W x 4.37"H
Item Weight	4.8 pounds
Manufacturer	SEAFLO
Manufacturer Part Number	SFDP1-030-055-42
Material Type	Pump head: nylon. Pump head cover: PPS. Motor housing: polypropylene. Valves/seals: EPDM. Diaphragm: Santoprene
Maximum Lifting Height	6 feet
Model Number	SFDP1-030-055-42
Number of Items	1
Number of Packs	1
Power Source	DC
Product Style	3.0 GPM - 55 PSI
Specific Uses For Product	Marine, RV, Off-Grid
UPC	647336945584 715934427631
Voltage	12 volts_of_direct_current

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TrustScore 4.5 | 7,300+ reviews

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The product exactly matches the description. Very satisfied with my purchase.

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$167.82

Duties & taxes included

In stock

Sold byAmazon British Virgin IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to British Virgin Islands.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

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Fantastic experience overall. Will recommend to friends and family.

1 month ago

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