Depending on the Tap tails,plastic or brass, if brass I would purchase some stainless steel jubilee clips of the correct diameter and secure them properly, nothing worse than water leaks in a motor home, especially if the pump then empties the contents of the water tank into the van. You might not be there to stop it, by switching off the pump.
http://www.hoseshop.net/clamps-clips/stainless-steel-jubilee-clips/stainless-steel-jubilee-clip-8?gclid=CjwKEAjwotmoBRCc6LWd2ZnkuBYSJACyt2quclgN4wFNLH4O9EH34obAxMh1BXtPgsLWD3DaaB33yBoCu_Xw_wcB
if plastic, it can still be done, but with much more restraint on the tightening, you wouldn't want to crack the tap.