My safety valve keeps on failing during device check

My safety valve keeps on failing during device check on start up, however I am finding it difficult to access the safety valve itself in order to test it's diaphragm.

Ideas?

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0