Hohum - mains to 12v electrical help if possible please

Hi,

I want to run up to 3  12v bilge pumps, from a standard house wall plug if atall possible. And I want somebody more knowledgeable than me to make sure it’s not an rcd blowing experience. 

The pumps are Seaflo 1100gph bilge pumps 
From the manufacturer
12v

3.0 amps, 6.0  max current draw

ive found a transformer , which is apparently for led lights , but it “seems” appropriate  The led zone 12 v converter is

In
100-250v

2.8a

350w

Out

12+-.5v

25a

300w

does that sound like it will 

a - work

b - not explode

c - on the very remote chance (pumps will be slightly height staggered, which should make their auto startups at different times) all 3 pumps kick in together not trip out etc

ta