Equipment and Supplies: Samplers--Problems with installation of plastic nozzles on samplers


                                              June 13, 1980


QUALITY OF WATER BRANCH TECHNICAL MEMORANDUM NO. 80.18

Subject: Equipment and Supplies: Samplers--Problems with 
         installation of plastic nozzles on samplers

It has been brought to our attention that if teflon or nylon 
nozzles are screwed into the DH-48 sampler body too tightly, 
they will bend. This is due to the fact that the nose of the 
sampler is not perpendicular to the axis of the nozzle.

Nozzles should be tightened by hand, and screwed in to the 
point at which the knurled part of the nozzle just touches 
the body. Tightening by pliers generally is not necessary, 
but if pliers must be used, do not tighten beyond this point.

Other types of samplers may present a similar problem; 
however, we do not believe it to be as severe as that of the 
DH-48 sampler. Tightening of nozzles in all types of samplers 
by use of pliers is discouraged.



                                     R.J. Pickering

File: EQ 1030

Memoranda superseded: None

Keywords: Water quality, sediment samplers, nozzles, 
          equipment.

WRD Distribution: A, B, FO, PO