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 efficiency

💧3.0 GPM steady flow

🔧4-year industry-leading warranty

¥30437

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Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

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

WHISPER QUIET OPERATION - Integrated bypass and vibration-dampening base ensure near-silent performance, perfect for tight RV or marine spaces.
PLUG PLAY INSTALLATION - Standard 1/2"-14 MNPT ports and mounting footprint make upgrades or replacements hassle-free and fast.
RELIABLE ON DEMAND PRESSURE - Delivers a consistent 55 PSI for smooth, uninterrupted freshwater flow in any off-grid or mobile setup.
SELF PRIMING RUN DRY SAFE - Effortlessly primes up to 6 feet and protects itself during low water or tank swaps—no downtime, no worries.
CERTIFIED SAFE FOR DRINKING WATER - NSF/ANSI and UL certified for potable water systems, guaranteeing safe, clean water wherever you roam.

The SEAFLO 42 Series 12V RV Water Pump offers a robust 3.0 GPM flow at 55 PSI, designed for continuous-duty use in RVs, boats, and off-grid systems. Featuring self-priming capability up to 6 feet, run-dry protection, and a quiet bypass system, it ensures reliable, smooth freshwater delivery. Certified safe for potable water and backed by a 4-year warranty, this pump combines durability with easy installation for the modern mobile lifestyle.

Specifications

ASIN	B01CQ7DD0S
Best Sellers Rank	#3,275 in Automotive ( See Top 100 in Automotive ) #2 in RV Water Pumps & Accessories
Brand Name	SEAFLO
Color	Orange
Customer Reviews	4.4 4.4 out of 5 stars (2,268)
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
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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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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¥30437

Duties & taxes included

In stock

Sold byAmazon JapanDelivered 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 Japan.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Farhan Q.

The delivery time was excellent, and the packaging was secure.

2 months ago

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Smooth transaction and product arrived in perfect condition.

3 weeks ago

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