Does max head pressure include 90 degree turns etc?

[Cv111]

I have Syncra silent 1.5 that I was planning on using for my tank (357 GPH). I realized afterwards I needed to calculate head loss properly. I think I made a mistake but I do not understand max head height ratings properly, so I am not sure.

I will need to pump water approx 45 inches up to my tank from the sump. I will also need two 45 degree fittings and one 90 degree fitting. The overall length of pipe I'll need will be around 4 feet.

I have calculated a 5.5 total head loss using one of those online calculators which did not include any head loss from a check valve or additional head loss from loc line tubing for the return..

Do I need to upgrade to the 2.0 or even 3.0? This is for a 48 gallon setup. I think I strongly misunderstood the 10x GPH flow rule of thumb.

 

[ca1ore]

The rated head pressure point for most pumps is based on a straight pipe. Add in any further friction losses and the number goes down. I’ve a bunch of the synchra pumps at home .... the 1.5 is rather wimpy.

 

[gabrieltackitt]

I’ve always used the rule of 1 ft up = 1ft head pressure, each 90 deg turn = 1 ft of head pressure, and 10 ft horiz = 1 ft of head pressure. It’s not an exact fit but I’ve found it always works for getting rather close.

 

[Plecosam]

The rated head pressure point for most pumps is based on a straight pipe. Add in any further friction losses and the number goes down. I’ve a bunch of the synchra pumps at home .... the 1.5 is rather wimpy.

Yes I agree rather wimpy and noisy, little vibrator.