I'm looking to use a 12V 60W DC water pump in my project, and I'm trying to find a suitable way to supply power for the pump. I'm wary about using the brick-like power adapters as I think they are not reliable. I see that SMPS is more reliable. Can I use a 12V 10A SMPS unit to power the pump ? One concern is that I read that a DC motor could draw upto 3 times more current while starting. So the SMPS could cut-off supply due to overload. Please note, I will be turning the pump on/off many times in day using arduino/relay control.
It's probably adequate. The pump draws 60W continuous, which is 5A, according to the nameplate, and you are proposing a 10A power supply.
Diaphragm pumps, to my knowledge, do not tend to draw enormous current on start-up, and the power supply, if the ratings are real, is capable of supplying some startup surge, so a 2:1 factor is probably okay.
The only way to be sure, really, is to test it. You could also go for a much bigger power supply to be more sure.
Can I use SMPS to power 12V DC water pump
I'm wary about using the brick-like power adapters as I think they are not reliable. I see that SMPS is more reliable.
Most of these power supplies are SMPS. You've got some misunderstanding there.
One concern is that I read that a DC motor could draw upto 3 times more current while starting.
Depending on the motor, a limitation of how much overcurrent the power supply can source might or might not be a problem. For pumps, I'd expect the motor not to need overly much turn-on current, because there's most likely not much mechanical torque that needs to be generated to get the motor started. But: without knowing how exactly your pump motor works, this is all speculation.
As a general hint: if you need reliability, I don't think "the thing I found on ebay looks fine, I'll go ask electronics.stackexchange.com whether it'll work" is a good idea.