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 Diaphragm Pump with Bypass for Reduced Cycling 12V/24V 3.0GPM 55PSI (12 Volts)

Seaflo 42 Series Diaphragm Pump with Bypass for Reduced Cycling 12V/24V 3.0GPM 55PSI (12 Volts)

Product ID: 205500056

Details

Brand
Seaflo
Colour
Orange
Item weight
2.18 kg
Maximum flow rate
3 Gallons Per
Maximum lifting height
6 Feet
Power source
Adaptors

⚡12V/24V dual voltage power

💧3.0 GPM consistent flow

🔇Quiet operation with bypass tech

R4128

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Description

💧 Elevate your water game with quiet, reliable power that keeps you flowing—anywhere, anytime.

POWER MEETS PRECISION - Dual voltage (12V/24V) adapts seamlessly to your setup, powering up to 3.0 GPM with 55 PSI pressure for reliable performance.
PLUG PLAY INSTALLATION - Standard 1/2"-14 MNPT ports and mounting footprint make integration into marine, RV, or off-grid systems a breeze—no hassle, just flow.
WHISPER QUIET WATER FLOW - Integrated bypass reduces cycling and noise, delivering smooth, steady water pressure without the usual pump racket.
SELF PRIMING RUN DRY SAFE - Effortlessly self-primes up to 6 feet and protects itself from damage during dry runs—perfect for unpredictable water conditions.
BUILT TO LAST BACKED TO TRUST - Industry-leading 4-year warranty and durable Santoprene diaphragm with EPDM valves ensure long-term, maintenance-free operation.

The SEAFLO 42 Series Diaphragm Pump is a compact, high-performance 12V/24V pump delivering 3.0 GPM at 55 PSI with self-priming up to 6 feet. Featuring an internal bypass for reduced cycling and noise, durable Santoprene diaphragm and EPDM valves, and backed by a 4-year warranty, it’s engineered for marine, RV, and off-grid potable water systems requiring reliable, quiet, and maintenance-free operation.

Specifications

ASIN	B01CQ7DD0S
Best Sellers Rank	51,296 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 19 in Boat Water Pressure Pumps
Brand	Seaflo
Colour	Orange
Customer Reviews	4.4 4.4 out of 5 stars (2,187)
EU Spare Part Availability Duration	4 Years
Flow Rate	3 Gallons Per Minute
Included Components	51S01 Filter, 51F01 Fitting
Item Dimensions L x W x H	20.2L x 12.5W x 11.1H centimetres
Item Weight	2.18 kg
Manufacturer	SEAFLO
Material	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
Part Number	SFDP1-030-055-42
Power source	Adaptors
Product Style	Diaphragm
UPC	647336945584 715934427631
Unit Count	1.0 count
Usage	Marine, RV, Agricultural Spraying, General Industrial, Filtration, Beverage Processing, Solar Water System, Homeowner, Traveling, Construction
Voltage	12 Volts (DC)

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R4128

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered 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 South Africa.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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