Can you adjust the "shut-off" pressure down from 45 PSI?

Locate the allen screw on the pressure switch located on the front of the pump, use an allen key to turn it clockwise to increase pressure or counterclockwise to decrease pressure.

Can you hook up to 3/4 pex?

The output is 1/2" MNPT. You would need a 1/2"FNPT to 3/4" Pex Fitting

could this pump, pump water up 6 feet

Yes, this pump will both pull and push water up 6 feet.

Why will my pump make noise but not pump water. It has been dry for 5 days of travel. Now we are parked and it’s not working.

2 possible problems come to mind. The pump is self priming, as long as there is water in the tank getting to the pump it should work. There is a possibility that it was installed the wrong way, there is an intake opening and an output opening. Check that, it could be the problem. The pump could also be defective if there is water getting to it and it is installed correctly but still not working...

Seaflo 12v 2.8 GPM 45 PSI Water Pressure Pump by Seaflo

Product ID: 543190028

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Details

Brand
Seaflo
Colour
Black
Item weight
4.2 Pounds
Material
EPDM
Maximum flow rate
3 Gallons Per
Maximum lifting height
6 Feet

⚡12V DC power for versatile off-grid use

💧3.0 GPM flow rate for steady water delivery

🔇Ultra-quiet vibration dampening mount

Description

💦 Pump up your off-grid lifestyle with silent, certified power!

EFFORTLESS AUTOMATION - Built-in adjustable pressure switch starts/stops pump on demand for hands-free water management.
WHISPER QUIET OPERATION - Noise-reducing rubber mount minimizes vibration, keeping your RV or boat environment serene.
CONSISTENT FLOW ANYTIME - Delivers a reliable 3.0 GPM at 45 PSI, perfect for multiple fixtures running simultaneously.
CERTIFIED SAFE FOR DRINKING - NSF, UL, and CSA certifications ensure potable water safety and compliance with RV/marine standards.
DURABILITY MEETS PEACE OF MIND - Backed by a 4-year warranty and designed with a rugged 3-chamber diaphragm for long-lasting performance.

The Seaflo 12V 2.8 GPM Water Pressure Pump combines certified potable water safety with a robust 3-chamber diaphragm design, delivering steady 45 PSI pressure. Engineered for RVs, boats, and cabins, it supports up to four fixtures simultaneously with ultra-quiet operation and automatic pressure control, all backed by a 4-year warranty for reliable, long-term use.

Specifications

ASIN	B00P8BE6S8
Batteries Required?	No
Batteries included?	No
Best Sellers Rank	229,218 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 89 in Boat Water Pressure Pumps
Colour	Black
Customer Reviews	4.3 4.3 out of 5 stars (227)
Date First Available	4 Jan. 2016
Flow rate	3 Gallons Per Minute
Included Components	(1) SEAFLO 33-Series Diaphragm Pump (1) Set of Instructions (2) 1/2" Barbed Hose Adaptors (1) 50 Mesh Inlet Strainer
Item Package Quantity	1
Item Weight	1.91 kg
Item model number	SFDP1-030-045-33
Manufacturer	SEAFLO
Material	EPDM, Santoprene
Part Number	SFDP1-033-045-33
Power Source	dc
Product Dimensions	19.91 x 12.7 x 11.73 cm; 1.91 kg
Special Features	Automatic pressure switch
Style	Thermal
Usage	Potable Water Pump
Voltage	12 Volts (DC)

Reviews

M**K

Works well

Great pump

29.10.2025

E**N

キャンパーの給水システムに使用。以前つけていたDCポンプに比べて、力もあるし静音性も良い！一年近く使用しているが、耐久性に問題なし。

17.11.2025

É**S

great pump super quiet , holds pressure now , my old one was loud and ran every 5 mins , super happy now

5.08.2025

R**A

Excelente bomba ya es la 4 que compro

22.04.2025

ع**ر

Great product and well packed.thanks

10.03.2024

D**.

Super quiet and very well built. Worth the price. 2.8GPM as described!

29.01.2026

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